gelbooruhttps://xbooru.com/index.php?page=atom&tags=2020s 2022 abosinsin ambiguous penetration animated skeleton autopenetration bad id bad twitter id blue tentacle blue tentacles blush bottom sans ectoplasm english text grey background male only oral pants down pants pulled down penetration sans sans (undertale) skeleton solo tentacle tentacle in mouth tentacle sex text text bubble twitter username uke sans undead undertale undertale (series)2024-05-14T18:58:59Zgelbooru