Why do babies fight sleep?

I chose this question because I'm curious about what other moms think too. I think that babies fight sleep because they just don't know. Even adults do it. It takes us forever to figure out that a good nights sleep is all we needed to get out of our funk.

But how would babies know that? My son just found out about 2 months ago that he has feet. There's no way he understands that sleep is needed and important and will put him in a better mood.

What you do mamas think?

Moms Expertise
    8Theresa Gould
    I thought the same things you all did.
    About Alissa
    Current: Chinook, Montana
    Birth: September 17
    On Moms.com since: Jan 30, 2014
    *Site Hostess* I am a first time mom living in North Central Montana. I have a fiance, the most gorgeous baby boy, and a goofball dog named Lexi to fill up my plate :)