This girl was 12 years old
and just starting puberty. Her mom thought it was time to teach her some things about sex, but wanted her husband to do it. So the girl´s dad called her for a serious talk:

"Darling, you mother said it´s time to talk about sex... Look, it´s very awkward for me to talk about this to you, so I will say only one thing: when you make love with a boy, never, NEVER do it the other way around."

So the girl grew up, started dating, got a boyfriend, made sex for the first time, second time, got married. She was married for 9 years, when, one night, her husband turned to her and said:

"Honey... how about if we make it the other way around?"
"No darling, no, I told you I would never, NEVER make it the other way around."
"But honey, don´t you wanna have kids?"
(Monocromatico Lady Godiva's horse, Fri 10 Sep 2004, 1:11, Reply)