Monsters have been in the surface for awhile now, and your friend is one. When you asked what it was like when he was a kid, the skeleton would always say it wasn't interesting. But Sans' expression said otherwise. One day, he finally opened up to you, explaining all the things Gaster did to him and Papyrus. "I...Didn't want to but, you deserved to know." Sans muttered, his eyelights not present in his sockets.