I was forced to go camping with my church youth group when I was 12. The campground had bathrooms and showers, and I ended up showering late each night after bringing horses into stables. About the third night, without warning, a naked girl my age popped under the shower walls and immediately began grinding on me. I had no idea what to do and she put it in as soon as I was hard.I came hard immediately and she giggled and crawled back out. This happened a few times, and just before the trip was over I saw her with her group. She was somewhat mentally disabled. Later I saw my aunt, who was a chaperone on the trip, having s** with a man from the same group down by a lake. When I got older I realized that somebody had been having s** with her for her to have that much knowledge of it in the first place. It was probably the guy who was boning my aunt. That’s just messed up.