Did you Pass the Test?

I was out walking with my 4 year old daughter. She picked up something off the ground and started to put it in her mouth. I took the item away from her and I asked her not to do that.
"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 Mom Test. You have to know it, or they don't let you be a Mom."
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 dad."

''Exactly", I replied back with a big smile on my face.