Thread:NightError!Sans/@comment-35757757-20191119221913/@comment-43795915-20200106213801

MML!opinions!Fun!Chocolate! wrote: Magic

They magically create new babies out of bones XD

Either that or newspapers can magically create skeletons because in the ancient college notebook of Toby Fox, Sans said his dad’s a newspaper XD (or his mom, I dunno). Though that is Toby’s old concept art stuff... My theory is: The SOUL.

So it's still sorta magical, but I think that skeletons (And monsters in general) reproduce using their SOULs. Since, as you said earlier:

https://images.app.goo.gl/VJVTdhiFkAU5CAb49