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1boy 1boy1girl 1girl 2024 2d 2d_(artwork) all_fours alternate_version_available amalgamate_(undertale) animal_genitalia animal_penis artist_name ass ass_up balls beastiality big_ass big_balls big_belly big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller black_penis blue_topwear blush bottom_heavy bottomless bottomless_female breasts brown_hair calves canid canine canine_penis canis claws clenched_teeth closed_eyes clothed clothed_female clothes clothing cum cum_in_pussy cum_inside cum_pool cumflated_belly cumflation digital_media_(artwork) doggy_position dominant dominant_feral dominant_male drooling duo endogeny english_text excessive_cum female_frisk female_human female_penetrated femsub feral feral_on_female feral_on_human feral_penetrating feral_penetrating_human fluffy_ears fluffy_tail footwear frisk frisk_(undertale) from_behind_position front_view furry_balls genital_fluids genitals hetero holding_head huge_penis human impregnation indoors inflation interspecies interspecies_impregnation kneel knot large_ass large_balls large_penis larger_feral larger_male larger_penetrating larger_penetrating_smaller legs_apart light-skinned_female light_skin male male/female male_feral/female_human male_penetrating male_penetrating_female maledom medium_hair monster multi_leg multi_limb on_floor open_mouth ovum partially_clothed paw_on_head paws penetration penis penis_in_pussy pussy_juice pussy_juice_string raised_leg sequence sequential sex sex_from_behind shirt shoes signature size_difference small_sub small_sub_big_dom smaller_female smaller_human smaller_penetrated smaller_sub smaller_sub_bigger_dom sperm_cell straight striped_clothing submissive submissive_female submissive_human sweater sydneysnack tail teeth testicle text thick_thighs thighs tongue topwear trembling undertale undertale_(series) vaginal vaginal_juices vaginal_penetration vaginal_sex video_game_character video_games white_body white_fur wide_hips zoophilia
1boy 1boy1girl 1girl 2024 2d 2d_(artwork) all_fours alternate_version_available amalgamate_(undertale) animal_genitalia animal_penis artist_name ass ass_up balls beastiality big_ass big_balls big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller black_penis blue_topwear blush bottom_heavy bottomless bottomless_female breasts brown_hair calves canid canine canine_penis canis claws closed_eyes clothed clothed_female clothes clothing digital_media_(artwork) doggy_position dominant dominant_feral dominant_male drooling duo endogeny english_text female_frisk female_human female_penetrated femsub feral feral_on_female feral_on_human feral_penetrating feral_penetrating_human fluffy_ears fluffy_tail footwear frisk frisk_(undertale) from_behind_position front_view fur furry_balls genital_fluids genitals hair hetero holding_head huge_penis human indoors interspecies kneel knot large_ass large_balls large_penis larger_feral larger_male larger_penetrating larger_penetrating_smaller legs_apart light-skinned_female light_skin male male/female male_feral/female_human male_penetrating male_penetrating_female maledom medium_hair monster multi_leg multi_limb on_floor open_mouth partially_clothed paw paw_on_head paws penetration penis penis_in_pussy pussy_juice pussy_juice_string raised_leg sequence sequential sex sex_from_behind shirt shoes signature size_difference small_sub small_sub_big_dom smaller_female smaller_human smaller_penetrated smaller_sub smaller_sub_bigger_dom straight striped_clothing submissive submissive_female submissive_human sweater sydneysnack tail teeth testicle text thick_thighs thighs tongue top-down_bottom-up topwear trembling undertale undertale_(series) vaginal vaginal_juices vaginal_penetration vaginal_sex video_game_character video_games white_body white_fur wide_hips zoophilia
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1boy 1girl 1girl1boy 2d 2d_(artwork) animated_skeleton anthro anthro_penetrating anthro_penetrating_humanoid big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_penetrating bigger_penetrating_smaller blue_blush blush boss_monster bottom_sans bottomless bottomless_male bra breasts caprine digital_media_(artwork) dildo doggy_position dominant dominant_anthro dominant_female drooling duo ectoplasm english_text female/male female_anthro female_penetrating female_penetrating_male femdom floppy_ears from_behind_position fur furry furry_female goat goat_ears goat_girl goat_horns grabbing_sheets grey_background gripping_sheets hetero horns humanoid humanoid_penetrated kneel larger_anthro larger_female larger_penetrating larger_penetrating_smaller male male_moaning male_penetrated malesub mature mature_anthro mature_female milf moaning monster monster_girl motion_lines partially_colored pegging penetration penetration_from_behind profanity sans sans_(undertale) sex sex_from_behind sex_toy simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom straight strap-on submissive submissive_male sweat tail tail_tuft talking talking_to_another talking_to_partner tears text thrusting topwear toriel torisans uke_sans undead undertale undertale_(series) underwear unknown_artist video_game_character video_games white_body white_fur
1boy 1girl 1girl1boy 2010s 2018 2d 2d_(artwork) ahegao animated_skeleton anthro anthro_penetrating anthro_penetrating_humanoid ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush boss_monster bottom_sans breasts caprine digital_media_(artwork) disembodied_hand disembodied_hands dominant dominant_anthro dominant_female dominant_pov duo ectoplasm ectotongue english_text female/male female_anthro female_penetrating female_penetrating_male female_pov femdom floppy_ears from_front_position fur furry furry_female goat goat_girl grabbing_sheets gripping_sheets heart-shaped_pupils heart_eyes hetero humanoid humanoid_penetrated interlocked_fingers intertwined_fingers ireallyneedtofindabetternamesoon larger_anthro larger_female larger_penetrating larger_penetrating_smaller leg_grab male male_focus male_moaning male_penetrated malesub mature mature_anthro mature_female milf moaning monster monster_boy monster_girl nude nude_male open_mouth partial_female pegging penetrating_pov penetration penetrator_pov pink_background pleasure_face pov pov_hands sans sans_(undertale) sequence sequential sex sex_toy simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus straight strap-on submissive submissive_male tail tail_tuft tears text tongue tongue_out toriel torisans tumblr uke_sans undead undertale undertale_(series) unseen_female_face video_game_character video_games white_body white_fur
1boy 1girl 1girl1boy 2010s 2018 2d 2d_(artwork) ahegao animated_skeleton anthro anthro_penetrating anthro_penetrating_humanoid ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_female bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush boss_monster bottom_sans breasts caprine digital_media_(artwork) disembodied_hand disembodied_hands dominant dominant_anthro dominant_female dominant_pov duo ectoplasm ectotongue english_text female/male female_anthro female_penetrating female_penetrating_male female_pov femdom floppy_ears from_front_position fur furry furry_female goat goat_girl grabbing_sheets gripping_sheets heart-shaped_pupils heart_eyes hetero humanoid humanoid_penetrated interlocked_fingers intertwined_fingers ireallyneedtofindabetternamesoon larger_anthro larger_female larger_penetrating larger_penetrating_smaller leg_grab male male_focus male_moaning male_penetrated malesub mature mature_anthro mature_female milf moaning monster monster_boy monster_girl nude nude_male open_mouth partial_female pegging penetrating_pov penetration penetrator_pov pink_background pleasure_face pov pov_hands sans sans_(undertale) sequence sequential sex sex_toy simple_background size_difference skeleton small_sub small_sub_big_dom smaller_humanoid smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus straight strap-on submissive submissive_male tail tail_tuft tears text tongue tongue_out toriel torisans tumblr uke_sans undead undertale undertale_(series) unseen_female_face video_game_character video_games white_body white_fur
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2010s 2017 2boys 2d 2d_(artwork) after_sex anal anal_penetration anal_sex animated_skeleton arm_around_another's_neck arm_around_neck ass big_dom bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blanket blush bottom_sans bottomless closed_eyes completely_nude completely_nude_male digital_media_(artwork) domimant domimant_male duo elemental_creature elemental_humanoid fire_elemental from_front_position grillby hand_on_back hand_on_neck humanoid interlocked_fingers intertwined_fingers korean_text larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male maledom malesub missionary_position monster monster_boy multiple_views muscular muscular_male nude nude_male orange_body penetration sans sans_(undertale) seme_grillby sex simple_background size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive submissive_male text top_grillby topless uke_sans undead undertale undertale_(series) video_game_character video_games white_background window yaoi yooutnsfw
2010s 2017 2boys 2d anal anal_penetration anal_sex animated_skeleton arm_support big_dom bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blanket blue_hoodie blue_jacket blush bottom_sans bottomless closed_eyes clothed clothing digital_media_(artwork) domimant domimant_male duo ectoplasm elemental_creature elemental_humanoid eyewear fire_elemental from_behind_position from_front_position glasses grillby grillsans hooded_jacket hoodie humanoid jacket kissing larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male maledom malesub mastery_position monster monster_boy motion_lines multiple_views nude nude_male oaytacnoom orange_body orange_penis penetration penis rectangular_eyewear rectangular_glasses sans sans_(undertale) seme_grillby sex simple_background size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom straddling submissive submissive_male sweat top_grillby topwear uke_sans undead undertale undertale_(series) video_games visible_breath white_background yaoi
2010s 2017 2boys 2d anal anal_penetration anal_sex animated_skeleton arm_support big_dom bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blanket blue_hoodie blue_jacket blush bottom_sans bottomless closed_eyes clothed clothing digital_media_(artwork) domimant domimant_male duo ectoplasm elemental_creature elemental_humanoid eyewear fire_elemental from_behind_position from_front_position glasses grillby grillsans hooded_jacket hoodie humanoid jacket kissing larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male maledom malesub mastery_position monster monster_boy motion_lines multiple_views nude nude_male oaytacnoom orange_body orange_penis penetration penis rectangular_eyewear rectangular_glasses sans sans_(undertale) seme_grillby sex simple_background size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom straddling submissive submissive_male sweat top_grillby topwear uke_sans undead undertale undertale_(series) video_games visible_breath white_background yaoi
2010s 2017 2boys 2d anal anal_penetration anal_sex animated_skeleton big_dom bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_belly blue_blush blue_body blue_hoodie blue_jacket blue_penis blush bodily_fluids bottom_sans bottomless chubby chubby_male claws closed_eyes clothed clothing digital_media_(artwork) domimant domimant_male duo ectobelly ectobody ectopenis elemental_creature elemental_humanoid fire_elemental fluids from_behind_position grillby grillsans hooded_jacket hoodie humanoid jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male maledom malesub monster monster_boy nude nude_male orange_body orange_penis partially_clothed penetration penetration_from_behind penis precum sans sans_(undertale) seme_grillby sex sex_from_behind simple_background size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sweat top_grillby topwear uke_sans undead undertale undertale_(series) unseen_male_face video_games weirddworms white_background yaoi
2010s 2017 2boys 2d anal anal_penetration anal_sex animated_skeleton big_dom bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_belly blue_blush blue_body blue_hoodie blue_jacket blue_penis blush bodily_fluids bottom_sans bottomless chubby chubby_male claws closed_eyes clothed clothing digital_media_(artwork) domimant domimant_male duo ectobelly ectobody ectopenis elemental_creature elemental_humanoid fire_elemental fluids from_behind_position grillby grillsans hooded_jacket hoodie humanoid jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male maledom malesub monster monster_boy nude nude_male orange_body orange_penis partially_clothed penetration penetration_from_behind penis precum sans sans_(undertale) seme_grillby sex sex_from_behind simple_background size_difference skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sweat top_grillby topwear uke_sans undead undertale undertale_(series) unseen_male_face video_games weirddworms white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dark_background digital_media_(artwork) duo fontcest from_behind_position hat headwear hooded_jacket hoodie implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2023 2boys 2d 2d_(artwork) all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dark_background digital_media_(artwork) duo fontcest from_behind_position hat headwear hooded_jacket hoodie implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi