Miss 3 being cute

This story was relayed to me by Miss 3's kindy teacher earlier this week...

Miss 3 and her best friend S were in the toilet area. S had finished and was waiting for Miss 3. "Miss 3, do you have a willie?" asks S (who does).
"Yes" says the little miss, after some thought
"Oh, cause my Mum doesn't, but maybe girls do and Mums don't"
Miss 3 pauses for more thought, "My Willy is a monkey and he sleeps with me in my bed at night"