Xbooru - 1boy 2020s 2022 animated skeleton artist name beetleevil blue blush blue tentacles blush bottom sans clothed clothing evilbeetle fingerless gloves gloves grey background hand on mouth hooded jacket hoodie jacket looking down male male only monochrome monster one eye closed pants partially colored sans sans (undertale) shirt lift shirt pulled up shirt up simple background skeleton slippers socks solo solo male submissive tentacle tentacle on male tentacle under clothes tentacles in pants tentacles on male tentacles under clothes trembling uke sans undead undertale undertale (series)