I wore my gray dance pants the other day to the rec room on campus. Right when I walked in, a girl asked me to join her on the dance machine. So I did. The spandex was obviously quite revealing. But she didn't seem to mind at all. We danced several rounds. In between games, as I leaned over to enter my high score, I know she got a good view of my butt outlined in the thin, stretchy fabric. There was one point when a couple of guys and girls walked by and were watching us. They stopped to sit down at a nearby table, but I could tell that they were trying to get a close view of my butt. One guy even got up and was like almost right behind me, and I'm sure he must've been amazed by the view. As I was jumping up and down, my butt was jiggling all over the place. I had on some really small bikini underwear, which could hardly hold my wiener in place. With all the movement, it was flopping up and down in front. I started to get aroused, which made the bulge even more obvious. I had to adjust it a couple times while dancing to keep it under control, which was kind of embarassing.