Just the other day while riding the Prague subway, I was standing and noticed a guy sitting not directly in front of me but to the side. He was wearing shorts and a t shirt and I noticed him adjusting himself. No big deal actually - we guys do that even in public. But when the stop came and he stood he clearly had a boner. He realized I saw it and tried pulling down his shirt. I just smiled and walked out with him. He walked real slowly until it went down I guess then got onto another train. These are the times when I wish I had my phone in hand (and not so obvious!) to snap a picture.