Emma has been really into learning how her body works. She has a body book that gives detailed information on hearing, seeing, smelling, muscles and the skeleton, and--of course, the digestive tract. So, it shouldn't come as a surprise to us when one day it would all sink in or 'out' as I should say.
The other day, Emma had asked for a hot chocolate and Daddy made her one with some marshmallows to top it off. When she came up to me, she said, "Mmmmm, that hot chocolate was delicious... Hot chocolate comes out as pee pee and the marshmallows come out the butt as poo poo." Feeling proud of her new-found understanding, she preceded to tell me over and over again while I acknowledge her brilliance and cracked up laughing.