1boy 2010s 2016 alternate_version_available animated_skeleton blue_hoodie blue_jacket blue_penis bottom_sans bottomless cussing ectopenis gradient_background hooded_jacket hoodie jacket male male_only monster penis pink_slippers profanity purple_tentacles sans sans_(undertale) simple_background skeleton slippers solo solo_male submissive swearing tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus uke_sans undead undertale undertale_(series) 1boy 2010s 2016 alternate_version_available animated_skeleton blue_hoodie blue_jacket bottom_sans bottomless cussing gradient_background hooded_jacket hoodie jacket male male_only monster pink_slippers profanity purple_tentacles sans sans_(undertale) simple_background skeleton slippers solo solo_male submissive swearing tentacle tentacle_on_male tentacles tentacles_on_male text tumblr_username twilightsuccubus uke_sans undead undertale undertale_(series)