Don't think sexuality comes into it, me & my friends all have a pretty good idea who's got what, all started from one loud friend telling everyone about it. Doesn't bother any of us, usually only comes up around alcohol. No pun intended...
Has to be a kick in the nuts, I've seen guys get a tiny tap, even cross their legs funny and crumle in agony, but girls get hit with a ball or punched and just a squeal or a bit of rubbing, no comparison!