On the pregnancy from Anal sex thing - it could be that the confusion arose from the transmission of STDs. AIDS is easily transmitted through anal sex because the lining of the rectum is very thin and the blood can absorb some things through the anus - that's how things like suppositories work. It's also a reason why wine enemas are a bad idea.
But semen can't get from the rectum to the uterus unless your internal organs are extremely messed up!

CasperTG

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You know, Blackadder, for me socks are like sex. Tons of it about and I never seem to get any.

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