Hey Tim: Many of today's gym shorts are made from thin material that can be quite revealing if the guy is not wearing compression shorts or supportive underwear. I had always worn briefs with my gym shorts, and then began to see guys at the gym who opted for boxers. I noticed that I could see the outline of their dicks as they moved from one piece of equipment to the next. I found an old pair of boxers at the back of my underwear drawer and tried them with my Champion mesh shorts. Bingo! Even totally limp, the ridge of my penis head showed on the right side of my shorts. Not being used to my dick pointing down, I got a semi right away. The fabric rubbing back and forth over the ridge of the crown was hyper stimulating, and semis were inevitable. I was hooked. The first few times that I went shopping wearing gym shorts and boxers, I could not control my dick while walking across the parking lot, and popped boners. I was both embarrassed and extremely turned on.