Talk:Sans/@comment-25815789-20151116163351/@comment-24601134-20151118204612

A monster's body is tied to their soul but I don't think they would bleed.

Someone on tumblr did come up with an idea that he was bleeding determination but I also doubt that because his body would melt or be unstable like with Undyne's when she is defeated in the Genocide run.

http://thesinnabun.tumblr.com/post/133179322525/sans-is-not-bleeding-ketchup-or-blood-it-cant-be