Xbooru - 1boy 2021 animated skeleton biting clothes biting shirt black censor bar blue background blue blush blue hoodie blue jacket blue penis blush blush lines bone bottom sans censor bar censored penis clothed cum cyan background ectopenis ectoplasm ejaculating on self ejaculation english text fingering fingering self fontcest handjob hooded jacket hoodie jacket jerking off masturbation moaning moaning in pleasure object insertion papysans penile masturbation penis pixiv id 3871107 sans sans (undertale) simple background skeleton socks solid color background solo text uke sans undertale undertale (series)