I've noticed this. I think it is the self-consciousness induced by the thought that there could be homos watching. One of the side-effects is that lots of kids come to train for team sports at my gym, but don't shower after practice at the gym--or, going by the atmospheric evidence, at any time. They reek. You can tell when they've been in the elevator. This will not be good for public health.
When I was in school, any kid who tried to skip the shower after practice would be thrown in with his clothes on.
That's okay, there is a new motivation that solves this problem. These men can shower with the women and not be refused access to check out their neighbors.