M's Questions

M is starting to really observe things around him and ask questions that I don't always know the answers to. Here is a sampling from today's "out of the mouth of babes" menu.

M: Mommy, why are my lips pink and the rest of my skin isn't?
Mommy: Uh, good question. I don't know, so let me look it up.

I still have not found an answer to this...even after fifteen minutes of web searching. If you know the answer, please let me know.

M: Mommy! Where does the water from waterfalls come from?
Mommy: When snow melts at the top of mountains, it flows down the mountain and sometimes goes over ledges as a waterfall.
M: Do people bring a lot of ice up to the top of the mountain for this?
Mommy: No. In cold places, it's so cold that rain comes down as snow instead. Then when it warms up, the snow melts.
M: Okay.

My brain hurts.