Xbooru - 1boy 1male 2020s 2023 animated skeleton black shirt blue penis blue tentacles blush bottom sans ectopenis legs apart legs spread looking down malesub matcha mothh pants around one leg pants pulled down penis pink socks precum purple socks sans sans (undertale) shirt lift shirt up skeleton socks socks on solo male submissive male tentacle tentacle around arm tentacle around leg tentacle around penis tentacle on male tentacles around arms tentacles around legs tentacles on male uke sans undead undertale undertale (series)