A mom was out walking with her 4 year old daughter. the child picked up something off the ground and started to put it in her mouth. The mother asked her not to do that.
“Why?”
“Because it’s been laying outside and is dirty and probably has germs.”
At this point, the child looked at her mom with total admiration and asked, “Wow! How do you know all this stuff?”
“Uh,” the mom was thinking quickly, everyone knows this stuff, “Um, it’s on the mommy test. You have to know it, or they don’t let you be a mommy.”
“Oh.”
They walked along in silence for 2 or 3 minutes, but the child was evidently pondering this new information.
“I get it!” she beamed. “Then if you flunk, you have to be the daddy.”