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2020s 2022 2boys 2d 2d_(artwork) abosinsin after_deepthroat after_fellatio after_oral animated_skeleton bad_id bad_twitter_id big_penis blue_blush blue_saliva blue_tongue blush bodily_fluids bottom_sans brother brother/brother brother_and_brother brothers clothed coughing covered_in_cum cum_on_face deepthroat dialogue digital_media_(artwork) dizzy_eyes duo ectopenis ectoplasm english_text excessive_cum face_out_of_frame fellatio fontcest gag gay grabbing_head grabbing_penis head_grab hoodie huge_cock huge_penis inactive_account incest large_penis licking licking_penis long_tongue male male/male male_only male_out_of_frame monster onomatopoeia oral orange_cum orange_penis papyrus papyrus_(undertale) papysans partial_male penis penis_grab saliva saliva_on_penis sans sans_(undertale) seme_papyrus semen_on_face skeleton solo_focus speech_bubble sucking_penis text text_bubble thick_cum thought_bubble throbbing_penis tongue tongue_on_penis tongue_out too_much_cum top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face veiny_penis video_game_character video_games white_background yaoi

2020s 2022 2boys 2d 2d_(artwork)abosinsin after_deepthroat after_fellatio after_oral animated_skeleton bad_id bad_twitter_id big_penis blue_blush blue_saliva blue_tongue blush bodily_fluids bottom_sans brother brother/brother brother_and_brother brothers clothed coughing covered_in_cum cum_on_face deepthroat dialogue digital_media_(artwork)dizzy_eyes duo ectopenis ectoplasm english_text excessive_cum face_out_of_frame fellatio fontcest gag gay grabbing_head grabbing_penis head_grab hoodie huge_cock huge_penis inactive_account incest large_penis licking licking_penis long_tongue male male/male male_only male_out_of_frame monster onomatopoeia oral orange_cum orange_penis papyrus papyrus_(undertale)papysans partial_male penis penis_grab saliva saliva_on_penis sans sans_(undertale)seme_papyrus semen_on_face skeleton solo_focus speech_bubble sucking_penis text text_bubble thick_cum thought_bubble throbbing_penis tongue tongue_on_penis tongue_out too_much_cum top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series)unseen_male unseen_male_face veiny_penis video_game_character video_games white_background yaoi

2020s 2022 2boys 2d 2d_(artwork) abosinsin after_deepthroat after_fellatio after_oral animated_skeleton bad_id bad_twitter_id big_penis blue_blush blue_saliva blue_tongue blush bodily_fluids bottom_sans brother brother/brother brother_and_brother brothers clothed coughing covered_in_cum cum_on_face deepthroat dialogue digital_media_(artwork) dizzy_eyes duo ectopenis ectoplasm english_text excessive_cum face_out_of_frame fellatio fontcest gag gay grabbing_head grabbing_penis head_grab hoodie huge_cock huge_penis inactive_account incest large_penis licking licking_penis long_tongue male male/male male_only male_out_of_frame monster onomatopoeia oral orange_cum orange_penis papyrus papyrus_(undertale) papysans partial_male penis penis_grab saliva saliva_on_penis sans sans_(undertale) seme_papyrus semen_on_face skeleton solo_focus speech_bubble sucking_penis text text_bubble thick_cum thought_bubble throbbing_penis tongue tongue_on_penis tongue_out too_much_cum top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face veiny_penis video_game_character video_games white_background yaoi

1:1 1:1_aspect_ratio 2020s 2022 2boys 2d 2d_(artwork) abosinsin animated_skeleton bad_id bad_twitter_id big_penis blue_blush blue_tongue blush bodily_fluids bone bottom_sans brother brother/brother brother_and_brother brothers can't_see_the_haters digital_media_(artwork) duo ectopenis english_text erect_penis erection fontcest genital_fluids genitals heart high_res huge_cock huge_penis humanoid inactive_account incest large_penis male male/male male_focus male_only male_out_of_frame meme monster orange_penis papyrus papyrus_(undertale) papysans penis penis_on_face penis_over_eyes precum sans sans_(undertale) seme_papyrus sibling skeleton solo_focus text these_aren't_my_glasses throbbing throbbing_penis tongue tongue_out top_papyrus twitter_username uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi

2010s 2015 2boys 2d 2d_(artwork) ahegao ambiguous_penetration anal animated_skeleton blue_jacket blush bottom_sans bottomless brother/brother brother_and_brother brother_penetrating_brother brothers calciumchan cussing digital_media_(artwork) duo english_text fontcest from_behind_position gloves incest intraspecies jacket male male_ahegao male_only male_out_of_frame male_penetrated male_penetrating male_penetrating_male moaning monster monster_boy papyrus papyrus_(undertale) papysans partial_male penetration profanity red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings skeleton solo_focus swearing sweat text third-party_source thrusting tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi