Why Do People Turn Into Retards Around a Pregnant Lady?

So, I was reading Courtney's blog (because see that's what I do:read hers, then respond here) and I was laughing at her story about Nigel saying she was different (fat), and not understanding it's because she's pregnant. It got me thinking about the truly retarded things people seem to do around a pregnant lady, or maybe someone they think is pregnant, but maybe isn't.

First, what's up with touching a pregnant lady's belly, when you don't even know said pregnant lady? Hello... invasion of privacy.

Second, is there some sort of reason why the most important question on God's green Earth becomes "how many weeks are you?" I've started answering this one with my age in weeks, rather than how many weeks pregnant Courtney is. It goes like this:

ME: I'm going to be a Dad.
CRAZY PERSON: Oh no kidding! How many weeks are you?
ME: (In the voice of a three year old) I one thousand, seven hundred, and thirty weeks.
CRAZY PERSON: Huh?

Lastly, there is this small matter of, uh, growth in the mother. And if the past week or two is any indication of the future, the growth is on. My wife looks pregnant, and I love it. But one time, someone looked pregnant, and I DID NOT love it.

It was my first day at a new job and my boss was asking me where I'd like to go to lunch. And so, noticing her pregnant belly (I'd estimate 7 1/2 months) I said, "Oh I don't have anything in mind, do you have any particular cravings?" To which she replied in a bit of a confused voice "Well.... no." Shit. I was so wrong. She had been pregnant, a few years back... So, I thought a second and said "Because on Mondays I usually crave a burger or something greazy."

Take it from me. Pregnant women don't usually want to be touched, asked how many weeks they every five minutes, and don't presume someone is pregnant until you've been given some proof.