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1boy 2020s 2023 alternate_version_available animated_skeleton balls blue_penis blue_testicles blush bondage bottom_sans bound bound_arms bound_legs ectopenis grey_background legs_apart male male_only mellouwana monster nude penis precum sacrum_lacing sans sans_(undertale) simple_background skeleton solid_color_background solo solo_male string submissive submissive_male sweat testicle uke_sans undead undertale undertale_(series)
1boy 2020s 2023 alternate_version_available animated_skeleton balls blue_penis blue_testicles blush bondage bottom_sans bound bound_arms bound_legs ectopenis grey_background legs_apart male male_only mellouwana monster nude penis precum sacrum_lacing sans sans_(undertale) simple_background skeleton solid_color_background solo solo_male string submissive submissive_male sweat testicle uke_sans undead undertale undertale_(series)
1:1 1:1_aspect_ratio 1boy 2d 2d_(artwork) animated_skeleton balls blue_blush blue_hoodie blue_jacket blue_penis blue_testicles blush bottomless bottomless_male clothed comic_sans digital_media_(artwork) ectopenis ectoplasm english_text fallen_ghost_angel_(artist) genitals glowing glowing_genitalia glowing_penis grabbing_own_penis hi_res high_res high_resolution hires hooded_jacket hoodie jacket looking_at_genitalia looking_at_own_penis looking_at_penis looking_down lying_on_back male male_masturbation male_only masturbation monster monster_boy on_back penile_masturbation penis pillow precum sans sans_(undertale) skeleton socks solo_male speech_bubble sweat talking_to_self testicles text twitter undead undertale undertale_(series) video_game_character video_games
1:1 1:1_aspect_ratio 1boy 2d 2d_(artwork) animated_skeleton balls blue_blush blue_hoodie blue_jacket blue_penis blue_testicles blush bottomless bottomless_male clothed comic_sans digital_media_(artwork) ectopenis ectoplasm english_text fallen_ghost_angel_(artist) genitals glowing glowing_genitalia glowing_penis grabbing_own_penis hi_res high_res high_resolution hires hooded_jacket hoodie jacket looking_at_genitalia looking_at_own_penis looking_at_penis looking_down lying_on_back male male_masturbation male_only masturbation monster monster_boy on_back penile_masturbation penis pillow precum sans sans_(undertale) skeleton socks solo_male speech_bubble sweat talking_to_self testicles text twitter undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2015 2d 2d_(artwork) animated_skeleton artist_name bad_id bad_tumblr_id balls blue_background blue_blush blue_eye blue_penis blue_testicles blue_tongue blush bottom_sans bound_arms bound_wrists chain chain_leash chains collar cowboy_shot digital_media_(artwork) drooling ectopenis ectotongue glowing_eye inactive_account male male_only malesub monster naked noxiousaberration nude penis sans sans_(undertale) simple_background skeleton solo solo_male submissive submissive_male sweat testicles tied_up tied_wrists tongue tongue_out tumblr uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2010s 2015 2d 2d_(artwork) animated_skeleton artist_name bad_id bad_tumblr_id balls blue_background blue_blush blue_eye blue_penis blue_testicles blue_tongue blush bottom_sans bound_arms bound_wrists chain chain_leash chains collar cowboy_shot digital_media_(artwork) drooling ectopenis ectotongue glowing_eye inactive_account male male_only malesub monster naked noxiousaberration nude penis sans sans_(undertale) simple_background skeleton solo solo_male submissive submissive_male sweat testicles tied_up tied_wrists tongue tongue_out tumblr uke_sans undead undertale undertale_(series) video_game_character video_games
1boy 2020s 2021 2d 2d_(artwork) ahegao animated_skeleton blue_belly blue_blush blue_body blue_hoodie blue_jacket blue_penis blue_testicles blue_tongue blush blushing bottom_sans chubby chubby_male clothed crying cum cum_on_face cumming digital_media_(artwork) ectobody ectopenis gripping_sheets hole_in_pants hooded_jacket hoodie jacket male male_ahegao male_only monster on_bed one_eye_closed penis sans sans_(undertale) shirt shorts skeleton solo solo_male sweating tears testicles tongue_out trembling uke_sans undead undertale undertale_(series) unknown_artist veiny_penis video_games
1boy 2020s 2021 2d 2d_(artwork) ahegao animated_skeleton blue_belly blue_blush blue_body blue_hoodie blue_jacket blue_penis blue_testicles blue_tongue blush blushing bottom_sans chubby chubby_male clothed crying cum cum_on_face cumming digital_media_(artwork) ectobody ectopenis gripping_sheets hole_in_pants hooded_jacket hoodie jacket male male_ahegao male_only monster on_bed one_eye_closed penis sans sans_(undertale) shirt shorts skeleton solo solo_male sweating tears testicles tongue_out trembling uke_sans undead undertale undertale_(series) unknown_artist veiny_penis video_games
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1boy anal anal_fisting animated_skeleton anthro ass autofisting balls big_ass blue_ass blue_background blue_body blue_butt blue_penis blue_testicles blue_tongue blush blushing bone bottom_sans butt clothing drooling ectobody ectobutt ectotongue fatsanssins fisting grabbing_ass grabbing_own_ass humanoid_penis kneeling legwear looking_back looking_behind male male_only masturbation monster penis sans sans_(undertale) self_fisting shorts simple_background skeleton socks solid_color_background solo solo_male testicles tongue tongue_out uke_sans undead undertale undertale_(series) vein veiny_penis video_games
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1boy 1male 2019 anthro avian beak biped bird black_penis blue_beak blue_eyebrows blue_eyes blue_feathers blue_tail blue_testicles blue_theme bottomless cellphone clothed clothing dialogue digital_media_(artwork) english_text erection eyebrows feathers furry glans highres holding_object holding_phone hoodie humanoid_penis large_penis male open_mouth penis phone pink_tongue simple_background sleeveless solo source_request speech_bubble spread_legs spreading talking_to_viewer testicles text tongue tweetfur twitter white_background white_clothing white_topwear zkelle
1boy 1male 2019 anthro avian beak biped bird black_penis blue_beak blue_eyebrows blue_eyes blue_feathers blue_tail blue_testicles blue_theme bottomless cellphone clothed clothing dialogue digital_media_(artwork) english_text erection eyebrows feathers furry glans highres holding_object holding_phone hoodie humanoid_penis large_penis male open_mouth penis phone pink_tongue simple_background sleeveless solo source_request speech_bubble spread_legs spreading talking_to_viewer testicles text tongue tweetfur twitter white_background white_clothing white_topwear zkelle
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2012 :q anal anal_insertion anal_penetration anus arms_behind_back big_breasts big_testicles black_claws black_hair blaze blue_eyes blue_nipples blue_penis blue_testicles blue_tongue breasts claws cum dildo dragon ear_piercing erection first_person_view from_below hair hand_on_breast hermaphrodite huge_breasts humanoid_penis insertion intersex licking licking_lips long_tongue looking_down lube multicolored_body nude open_mouth orange_body orange_skin penetration penis piercing presenting pussy red_skin scalie sex_toy shiny short_hair showkaizer solo spread_legs spreading standing tail_tuft teeth testicles thighs tongue tongue_out tuft vein veins voluptuous