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2010s 2018 2boys 2d 2d_(artwork)anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectotongue fontcest from_behind_position glowing grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth papyrus papyrus_(undertale)papysans penetration penetration_from_behind pleasure_face realdemdemdmensfw sans sans_(undertale)seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series)unseen_male_face video_game_character video_games white_background yaoi

2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectotongue fontcest from_behind_position glowing grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth papyrus papyrus_(undertale) papysans penetration penetration_from_behind pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi

2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_penis blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dated dominant dominant_male duo ectopenis fontcest from_front_position genitals glowing glowing_genitalia glowing_penis heart-shaped_pupils heart_eyes incest jacket kneel larger_male larger_penetrating larger_penetrating_smaller male male/male male_only maledom malesub monster off_shoulder orange_blush orange_penis papyrus papyrus_(undertale) papysans penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive submissive_male sweat top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

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