Once upon a time, a few years ago, I was 'the other woman,' and sex in a normal bed was a rare luxury because 1) I had roommates who would talk and 2)obviously, his house was out of the question. Our meetings occurred in...odd places. One night, classy as this sounds, it was in the men's change room/showers at a white water rafting campsite. This isn't too outlandish - people have sex in washrooms all the time - but there was a small problem. Turns out that a thin layer of sand covered the concrete floors. Being on top, the only contact I had with the floor was my knees and the tops of my feet. Unbeknownst to me at the time (hey, I was distracted...gimme a break), the very abrasive floors absolutely shredded my knees and the tops of my feet. The wounds were bad enough that to this day, years later, I still have scars from them. Focus: Ever been injured during sex? Let's here about it.