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2010s 2017 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blush blushing_male bottom_sans bound bound_wrists brother brother/brother brother_and_brother brothers christmas clothed clothing digital_media_(artwork) dominant dominant_male domination duo ectopenis english_text fontcest genitals gloves happy_new_year imminent_sex incest intraspecies looking_at_genitalia looking_at_penis looking_down male male/male male_only maledom malesub monster monster_boy new_year orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_out precum questionable_consent red_gloves red_scarf sans sans_(undertale) santa_hat scarf seme_papyrus sequence sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_sub_bigger_dom submissive submissive_male taped_mouth text theyaois tied_up tied_wrists top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi

2010s 2017 2boys 2d 2d_(artwork)alternate_version_available animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blush blushing_male bottom_sans bound bound_wrists brother brother/brother brother_and_brother brothers christmas clothed clothing digital_media_(artwork)dominant dominant_male domination duo ectopenis english_text fontcest genitals gloves happy_new_year imminent_sex incest intraspecies looking_at_genitalia looking_at_penis looking_down male male/male male_only maledom malesub monster monster_boy new_year orange_blush orange_penis papyrus papyrus_(undertale)papysans penis penis_out precum questionable_consent red_gloves red_scarf sans sans_(undertale)santa_hat scarf seme_papyrus sequence sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_sub_bigger_dom submissive submissive_male taped_mouth text theyaois tied_up tied_wrists top_papyrus uke_sans undead undertale undertale_(series)video_game_character video_games yandere yaoi

2010s 2017 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blush blushing_male bottom_sans bound bound_wrists brother brother/brother brother_and_brother brothers christmas clothed clothing digital_media_(artwork) dominant dominant_male domination duo ectopenis english_text fontcest genitals gloves happy_new_year imminent_sex incest intraspecies looking_at_genitalia looking_at_penis looking_down male male/male male_only maledom malesub monster monster_boy new_year orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_out precum questionable_consent red_gloves red_scarf sans sans_(undertale) santa_hat scarf seme_papyrus sequence sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_sub_bigger_dom submissive submissive_male taped_mouth text theyaois tied_up tied_wrists top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi

1boy 1girl 3d 3d_(artwork) 3d_animation accessory animated anthro arm_support ass balls bat bat_wings bed bedroom bedroom_eyes big_ass big_breasts big_ears big_penis black_eyelashes blue_eyeshadow bouncing_breasts bouncing_tail breasts butt_jiggle chest_markings clothing cock_ring cum_drop dat_ass digital_media_(artwork) dominant dominant_female duo echidna eyelashes eyeshadow feet female foot_animation foot_fetish foot_play footjob footwear fur furniture genitals gif gloves gold_(metal) green_clothing green_footwear green_shoes hair handwear headboard high_framerate imminent_orgasm jewelry jiggling kneel knuckles_the_echidna leaning_on_elbow leaning_on_object lipstick looking_at_another looking_at_genitalia looking_at_penis looking_back looking_down loop lube lube_on_penis lying lying_on_bed makeup male male/female mammal markings membrane_(anatomy) membranous_wings monotreme multicolored_clothing multicolored_footwear muscular narrowed_eyes nipple_piercing nipples on_back on_bed penis penis_accessory penis_jewelry piercing pillow pink_lipstick pink_toenails red_body red_clothing red_footwear red_penis red_shoes ring_(sonic) rouge_the_bat seductive sega setrixart sex shoes short_playtime small_tail smile sonic_the_hedgehog_(series) tail tail_motion tan_body teal_eyes thick_thighs vein veiny_penis wet wet_penis white_body white_fur white_hair wings yellow_clothing yellow_footwear yellow_shoes