Posted this story a long time ago, so copied and pasted:
"Kay, so I was dating this girl awhile back, and we'd been together, like, 4 months. We're both 15, and this was our first relationship for both of us, so neither of us have had sex before. Now that that's outta the way, onto the actual story.
We were swimming with her two brothers, and being the witty people we were, we told them to see who could hold their breath the longest so we could have some privacy for a few seconds. We started making out, and she wrapped her legs around my waist, but nothing sexual happened. The next day at school, she was scared that she was pregnant.
A 15 year old had no idea what sex was.
I dunno if this is common, but it kinda threw me for a loop. We broke up later that week."