"Why?" my daughter asked.
"Because it's been on the ground, you don't know where it's been, it's dirty and probably has germs" I replied.
At this point, my daughter looked at me with total admiration and asked, "Mommy, how do you know all this stuff? You are so smart."
I was thinking quickly. "All moms know this stuff. It's on the Mommy Test. You have to know it, or they don't let you be a Mommy."
We walked along in silence for 2 or 3 minutes, but she was evidently pondering this new information.
"OH...I get it!" she beamed, "So if you don't pass the test, you have to be the daddy."
"Exactly", I replied back with a big smile on my face.