I knew a pretty well-built and pretty good-looking gay guy with a PA and he said he likes knowing he's getting guys to noitice that a guy (he) is paying attention to his cock,and getting them to pay attention to it as well, at mixed gyms etc, beach wearing a swimsuit that a PA might show through, at least the shape of it. Snug thin 'sweats' as well. Been thinking of trying that myself--