Boys and their penises

Why oh why is the penis so fascinating for boys? My youngest caveman thinks it's hilarious to say the word penis. Today we were in a clinic waiting room and he said "it's funny when a bad guy in the movie gets hit in the penis!" I heard a bunch of quiet snickers. I told him not to say that word in the waiting room.
He said "Why, is it a bad word?"
Me: "No, but it's just not a word you just say anywhere and anytime you want to"
Him: "Oh, but it's funny when the bad guy gets hit in the penis."

Lately I have head the word penis fly out of his mouth a few too many times. He thinks the word is just hilarious. I personally don't like the word. I prefer to call it a wiener, a fireman, a thingy, and sometimes I even call my husband's Eric the one eyed viking.

Today, I walked out into the living room and my 10 year old caveman had his hand down his pants. WHAT? I said to him "Go wash your hands and use lots of soap and please don't do that in my living room." He was a bit embarrassed, so he says "I was just scratching my leg."
Me: "Well, I think you'd better find a different way to scratch your leg and certainly not on my couch"

Oh the things a mom has to endure when living with cavemen.