<human>: Provide a brief overview of the text.

So I was visiting my boyfriend in-between terms at his parents' house, his room is right next door to theirs so it limits the intimacy of our chosen activities.  One night we decide to go for a drive to widen the possibilities. I should mention its pitch black and his car is tiny, the back seats particularly so. Any way we pull over and things progress, we jump into the back and I climb on top. It's going surprisingly well considering the space, things are heating up and ask him to slap my ass, which is not unusual. He does so… well barely, just scrapes my left cheek with his fingertips, followed by an intense moan, and this is not his usual sex moan. I look down at him, and his faced is scrunched up with pain. After a few deep breaths, and me panicking that I'd broken his dick somehow, he proceeds to tell me that he'd slapped himself, with full force, in the balls. Needless to say the sex came to an abrupt end, but we had a good laugh about it… after the initial pain had subsided at least.
<bot>: Got it on in the back of a car and gave half the chromosomes of my potential future children an unintentional and premature spanking.