Talk:Sans/@comment-27512892-20151231220447/@comment-27354197-20160111034851

I think it's because of Sans' relationship with science and time travelling, as seen when you get him to give you the key to his bedroom. Papyrus seems to know about, like when he talks to Frisk about Sans "pranking them across time and space", and how the two just popped into existance in Snowdin and inserted themselves.

I don't know, but Sans is Sans, and he knows a lot of things.