So, I was climbing over a pretty big fence one day for the hell of it, and on the very top, my scrotum got stuck on the side of the fence, due to me being in a rush, I didn't notice and continued climbing, leaving my scrotum to be squished between the fence and my leg.
It hurt for a day or two, nothing too serious, and just today I went to take a piss and noticed that my balls were oddly colored, after taking a closer look, I realized that it was a bruise left from that day.
Discuse.
Tl;dr: A fence gave me aids.
