I must report that I have never seen an full erection at a gym, but plenty of semi-erections and plenty of penial bulges. When aerobics was fashionable it was not unusual for males to become semi-erect in the loose fitting satin shorts then in vogue : this caused by the slight rubbing effect. There was little left to the imagination with a clear outline of a penis. Bike shorts, when they came in, were worn without underpants and generally had a bulge, with some males very pronounced. There have been cases of triathlon athletes becoming erect in bike shorts.The first gym I attended has a sauna. It became a tradition for the males taking aerobics, then generally more female than male, to meet afterwards in the sauna. This was some experience with top public servants socialising and discussing Government policies with manual workers. At that stage the Gym employed a PE student, who was incidentally very well endowered, from Otago University over the summer vacation. He would join us but collapse in a corner exhausted. We had plenty of eye candy from him. Howard.