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2020 2020s animal_genitalia animal_penis animated_skeleton belly_bulge big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother brother/brother brother_and_brother brothers crying crying_with_eyes_open diphallism drool duo ectobody ectopenis fontcest from_behind gaster_blaster genitals grabbing_arms grabbing_from_behind hemipenes huge_cock huge_penis incest larger_male larger_penetrating larger_penetrating_smaller line_art lineart male male_out_of_frame male_penetrating monster monster_boy multiple_penises non-consensual nonconsensual nsfwgarbagedump nude papyrus papyrus_(undertale) papysans partial_male penetration penis prison_guard_position rape sans sans_(undertale) seme_papyrus sequence sequential sex size_difference skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tears top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male_face veiny_penis white_background yaoi

2020 2020s animal_genitalia animal_penis animated_skeleton belly_bulge big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother brother/brother brother_and_brother brothers crying crying_with_eyes_open diphallism drool duo ectobody ectopenis fontcest from_behind gaster_blaster genitals grabbing_arms grabbing_from_behind hemipenes huge_cock huge_penis incest larger_male larger_penetrating larger_penetrating_smaller line_art lineart male male_out_of_frame male_penetrating monster monster_boy multiple_penises non-consensual nonconsensual nsfwgarbagedump nude papyrus papyrus_(undertale)papysans partial_male penetration penis prison_guard_position rape sans sans_(undertale)seme_papyrus sequence sequential sex size_difference skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tears top_papyrus twitter uke_sans undead undertale undertale_(series)unseen_male_face veiny_penis white_background yaoi

2020 2020s animal_genitalia animal_penis animated_skeleton belly_bulge big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother brother/brother brother_and_brother brothers crying crying_with_eyes_open diphallism drool duo ectobody ectopenis fontcest from_behind gaster_blaster genitals grabbing_arms grabbing_from_behind hemipenes huge_cock huge_penis incest larger_male larger_penetrating larger_penetrating_smaller line_art lineart male male_out_of_frame male_penetrating monster monster_boy multiple_penises non-consensual nonconsensual nsfwgarbagedump nude papyrus papyrus_(undertale) papysans partial_male penetration penis prison_guard_position rape sans sans_(undertale) seme_papyrus sequence sequential sex size_difference skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tears top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male_face veiny_penis white_background yaoi

2020 2020s 2d 2d_(artwork) animal_genitalia animal_penis animated_skeleton begging_to_stop belly_bulge big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers covering_mouth crying crying_with_eyes_open digital_media_(artwork) diphallism duo ectobody ectopenis english_text fontcest gaster_blaster genitals hemipenes huge_cock huge_penis humanoid incest larger_male larger_penetrating larger_penetrating_smaller line_art lineart male male_out_of_frame male_penetrating monster monster_boy multiple_penises non-consensual nonconsensual nsfwgarbagedump papyrus papyrus_(undertale) papysans penetration penis pleading rape sans sans_(undertale) seme_papyrus sequence sequential sex size_difference skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tears text top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face veiny_penis video_games white_background yaoi

2020 2020s animal_genitalia animal_penis animated_skeleton big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub blue_blush blush bottom_sans brother/brother clothed/nude diphallism duo ectopenis ectotongue extra_eyes fontcest gaster_blaster genitals glowing_eyes hemipenes imminent_rape imminent_sex incest line_art lineart male monster multiple_eyes nsfwgarbagedump orange_eyes orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis sans sans_(undertale) seme_papyrus sequence sequential size_difference skeleton small_sub small_sub_big_dom tongue top_papyrus uke_sans undead undertale undertale_(series) veiny_penis white_background yaoi