When I was a teenager, I thought you could get pregnant from sitting in a jacuzzi. Not that I'm sure I even knew what a jacuzzi was, but I knew they were racy places where racy things happened. Men, as far as I remember, didn't even have to be there. So long as they'd been in the water in some sort of excitable state, pregnancy was inevitable - even if you kept your pants on. You see pregnancy was that easy, that dangerous and it could ruin your...