Have had quite a few over the years. Always remember the first. I was in my late 20's. A new gym had just started up. Mostly men so didn't bother covering up in changing room. Like being looked at, and looking, anyway. About fourth visit was quite warm during weights workout so took tee shirt off. Only few gents in. One, in his 50's, started to chat with me. He mentioned how good i looked tanned. I switched to the sit ups and he sat next to me. As i started he held my legs. My shorts rode up a bit and he asked if the tan went all the way. I started to get an erection, and not wearing pants, it was noticable. I said that it did. His hand slid up my thigh. He said that is was a turn on for him. He gently brushed my protruding head and said that he was going to get showered. I gave him a few minutes and followed.