I was out walking with my Grandson. 

He picked up something off of the ground and started to put it in his mouth. 

I took the item away from him and I asked him not to do that.

'Why' my Grandson 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 Grandson looked at me with total admiration and asked, "Grandma, how do you know all this stuff?? You are so smart."

I was thinking quickly and said to him. "All Grandmas know stuff. It's on the Grandma Test. You have to know it, or they don't let you be a Grandma."

We walked along in silence for 2 or 3 minutes, but he was evidently pondering this new information. "Oh....I get it! he beamed, So if you don't pass the test you have to be the Grandpa".

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