Rule 34 Dev - !! 1boy 2010s 2017 2d 2d_(artwork) animated_skeleton artist_request blue_blush blush bottom_sans clothed clothing covering_face digital_media_(artwork) disembodied_hand disembodied_hands drooling ectotongue edit edited english_text exclamation_point fluids gif grey_background groping hand_on_face hand_on_own_face hand_under_clothes hand_under_shirt hands heart heart-shaped_pupils hooded_jacket hoodie jacket looking_at_viewer looking_down male male_focus malesub moaning monster nervous partially_colored sans sans_(undertale) sequence sequential shirt_lift shirt_up simple_background skeleton slideshow solo_focus soul soul_sex submissive submissive_male sweat talking_to_viewer text third-party_edit tongue tongue_out topwear twitching uke_sans undead undertale undertale_(series) upper_body video_games|1037224