So you can see their junk, big whoop. That happens in any sport that requires tight clothing for speed; like rowing, cycling, speed skating, etc... Nearly everyone knows that a male of our species has a twig and berries.
I've competed in both rowing and cycling, and you get used to it. In rowing, we wore bright blue unitards. I even had a lycra skull cap and I basically looked like a giant blue sperm. When you go out there, you're not concerned if people can see your anatomy, you're out there for one purpose: to kick everyone's ass!