If you have taken showers with other fellows in high school, college or the military you have taken showers with gays present. No one, except a very stupid person, would make on overt approach in a shower with others present. It would, at least when I was young, have been a very unhealthy thing for a gay to do.
Are you really afraid of gays?
You're talking to someone else but I can tell you I would not like taking showers if I knew lesbians were around. And yes, I'm sure this happened before in gym class showers though I was fairly naive at the time (though I knew one of my gym teachers was gay).
It's even worse, however, if this is sanctioned. It implies, for one thing, that a straight person should not feel uncomfortable, and if they do, they need to get over it. This is the attitude coming down the pike with gay civil unions, gay marriage, etc.
The gay agenda is driving the changes here, I hope you know that. They goal is not to just have legal rights but to have homosexuality endorsed, and furthermore, that it should be a crime to speak out against it.
PS Just a reminder, I am the former astrologer who did charts for lesbians and lesbian witches, so the issue of fear is moot.