Keep Calm and Carry On

I had a weird thought spawned by the fact that one of my friends is pregnant.

What makes people want to be a gynaecologist? I really want to know the answer to this one.

What causes someone to wake up one day and suddenly say: I want to look up front bottoms all day!

And generally, they aren't even going to be pretty ones (working on trust here, people - I've only ever seen two in my life and didn't think they were particularly pretty. A few of my straight friends have assured me that there are pretty ones out there, though) because otherwise why would they be at the gynaecologist? Indeed, a large number are going to be ones with (hang on, convulsive shudder coming up) discharge or even (fighting the urge to regurgitate) clots.

So please, enlighten me. I'm genuinely, insanely, morbidly curious.