Churchgoers don't have sex.

I grew up in a very religious family that attended church every Sunday. We memorized the ten commandments and I came to believe that adultery in "Thou shalt not commit adultery" was the same thing as sex. Even when I was in middle school and learned that sex was the way babies are made, I still believed that my church members didn't have sex. I just assumed that some how if the husband and wife rolled over the same spot at different times the woman would get pregnant.

I remember being completely shocked when I found out what adultery really was!