Reading all about contraception here....makes me really glad I'm a lesbian. And reminds me of a, seriously I have to tell you this story.
I was in college at the time and one of the girls had decided she wanted to go on the pill, so I took her to get it (she didn't have a car and was new to town), after we picked up her script from the pharmacy she was reading the little insert and was asking if I knew about this, that and other. Because of my mother's sex education that started at 3 (age appropriate), I did know several things but some of it I didn't know. She was talking about how she was going to have to remember to take it every day at the same time and I commented "So glad I don't have to remember to do that", which promoted her to ask "Oh, you aren't on the pill? Do you do depo or that patch thing?" and I responded that no I didn't take any contraceptive medication. Cue her "But, Glitter, aren't, don't you pretty regularly play Scrabble?" and said "Well yes, but I'm a lesbian", and she says "But, aren't you worried about getting pregnant?", I just kind of stared at her for awhile. The pieces did fall into place eventually and she goes "Oh right...I never thought about that..lucky".
I've actually had a few adults forget exactly how babies are made. It's kind of funny to watch them go, oh right cause you'd need and you don't have...got it.