http://www.thefrisky.com/2011-11-14/girl-talk-how-lesbian-sex-changed-my-definition-of-straight-sex/
When I was a kid, I thought “sex” was two people peeing on each other. Like, I imagined you got in a bed naked and cuddled for so long that inevitably you would have to pee. But instead of getting up to pee, you just “let go” and peed together, in the bed. This romantic notion just made sense in my eight-year-old brain.
By the time I hit middle school, I totally knew what sex was. Or at least I acted that way, ready to jump on my more naive peers with a “You mean you don’t know?!”
I thought I had gathered the correct information about the genitals, for the most part. I stared at the instructions that came with boxes of tampons, and tried to understand how one went about inserting them … or anything at all down there. I prayed no one would give me a pop quiz about how the logistics of it all worked.
So when I was 15, and my 14-year-old boyfriend and I decided to have sex, it won’t shock you to know that we couldn’t figure it out. We knew sex meant this one act, this penetration thing, but it just didn’t work for us. Later, when we broke up, I wrote, heartbroken in my diary, that I’d “practically had sex with him.”