As a mother was walking with her 4-year-old daughter, the girl picked up something off the ground and started to put it in her mouth, and Mom told her not to do that.
"Why?" she asked.
"Because it's been lying outside and is dirty and probably has germs."
At this point, she looked at her mother with total admiration and asked, "How do you know all this stuff?"
Thinking quickly, she replied, "It's on the mommy test. You have to know it, or they don't let you be a mommy."
"Oh." She said seemingly satisfied. They walked along in silence for 2 or 3 minutes, but the daughter was evidently pondering this new information.
"I get it!" she beamed. "Then if you flunk, you have to be the daddy."