Anomaly_: Google a guy named "Onan" and the word "Onanism" and you'll find the passage you're referring to.
Basically it's a story of a guy who's brother dies so he marries his widow. Anyway, he nails his brother's widow but decides that he doesn't want to knock her up, thereby giving his brother (who's dead) a kid and pulls out at the last second, shooting on the ground. So God strikes him dead. It's a cute little story, where later on Onan and Er (the original husband)'s dad hooks up with his daughter-in-law and knocks her up, while not knowing that it was her. Gotta love the Bible.
I've known plenty of people who believed that oral or anal were ok, but not vaginal sex. That's just silly to me. Sex is sex, no matter what goes in where. I'm a Christian too, but I don't believe that sex between people who love each other is wrong. God created it and made it a wonderful thing if used properly and with lots of love. Ain't nothin' wrong with that...
Jason