When I was a sophomore in high school, we lived in a little town in Wyoming that was settled by a splinter group of very fundamentalist Mormons. One late night coming home on the school bus from some out of town event a senior girl asked me what it was that married people did that started the baby. I was a little shocked, in my class of about 40 sophomores there were three married couples! (I said Mormon, right?)
So I told her, they have sex, duh! She said, yeah she knew that, but WHAT was sex? Well, she was older than me, taller than me, and awful pretty. I imagine I was blushing enough to light up the back of the bus, but I managed to explain the mechanics. She whispered softly in my ear that I was evil and would spend all eternity in hell for saying such things and that no good Mormon girl would ever, EVER, expect to be involved in anything like that.
Last I heard she had 8 kids, so apparently there is another method I am yet unaware of, but am willing to learn.