When I first started fucking I genuinely believed that my vag would mold into the shape of his cock. Stop laughing at the back. During the first few months of that blissful introductory sex that you have when you first discover it, I pestered my boyfriend for everything from new positions to sex once an hour, until he suggested in an exhausted voice that we let his flaccid, knackered cock have a rest for a while. As I got more used to shagging, and found it easier to work out what did and didn't feel good, I came to the eventual conclusion that we'd created a neat 'fit'. That my hole had shaped nicely to match his peg, and so our compatibility was pretty spot on. To be fair, I also used to believe in homeopathy – we can't all be perfect when we're young. It took a while for me to shake off this weird belief. When I went to have sex with the next guy, his cock was roughly the same size and shape as my boyfriend's. So, safe in the idea that my vagina