Speaking of Belly's

Why do people feel they can touch your belly when you're pregnant? They just ooh and aah over that wonderful protrusion as if it's a cute little kitten they can pet and rub. It's like a magnet in a world full of over exuberant and well-meaning (I guess) baby lovers. I picture a crowd of zombies, arms outstretched, eyes dead, moaning grotesquely, coming toward my pregnant stomach. (Oh, God, I watch way too many movies!) Even total strangers can't stop themselves from touching it. I suppose some don't mind, I actually didn't mind when I was pregnant unless it would have been some letch that had "I'm a Pedophile and proud of it" on the back of his shirt.
Your body is your personal space and shouldn't be touched by others unless it's verbally authorized by you. If you don't want someone to do that, you have every right to smack their hands away. If people do the polite thing and ask...well, I guess it's Ok, just this once...