A woman went to her doctor for advice. Her husband had developed a penchant for anal sex, she wasn't sure it was such a good idea. The conversation went thus:
'Do you enjoy it?'
'Actually, yes, I do.
'Does it hurt you?'
'No. I rather like it.'
'Then there's no reason that you shouldn't practice anal sex, if that's what you like, so long as you take care not to get pregnant.'
'What? You can get pregnant from anal sex?'
'Of course you can, where do you think people like “Mike Andy-Oka” come from.'