Ive been pregnant before so I know its possible, but had major surgery last year (tumour of the liver), so perhaps that has something to do with my inability to conceive. I would just like to be having as much sex as possible, so this is causing an enormous (pardon the pun) problem!! your problem doesn't sound so great either, don't you get sore? how is your sexual health? when I was 17 I was as fit as anything, but my boyfriend at the time wasn't nearly as well endowed!!