Sans Undertale

Not completely unreasonable. He is the only “monster” to bleed after all

yeah

maybe he's a different kind of skeleton. one with veins inside his bones.

It's most likely bone marrow.

He's def a monster though, you can hear him turn to dust at the end of geno.

I can confirm

Papyrus turned to dust before he could bleed, since he got his head cut off

Have you seen the game theory video about sans and ness (from earthbound)? No, you haven't? You should!

I think humans are skeletons in disguise (science fr fr)

My theory is that sans and papyrus were ghosts who fused with human skeletons, but they're not related to napstablook, mad dummy, or METTATON.

yeah

prob

of course, he's ness

The only odd detail about this theory is that ness is a kid but sans acts like and adult man or a Bologna's student out of sede

he grew up mentally since then