Currently the situation is this, a bunch of guys go into a shower and take care of their personal hygiene. Everyone can reasonably assume that it is relatively safe as all present are “straight”. There is some guarantee against unwanted advances, the homosexual making those advances could get drummed out for it.
Now, allow gays in the military to serve openly. We can readily document where they claim sexual intercourse in public restrooms and showers is just “part of the homosexual lifestyle”. Now, if a gay suddenly decides to be agressive, the target of his “affections” will likely wind up in counseling for refusing his advance. As has already been stated, the military doesn't do anything halfway. They would literally have “advisers” from the homosexual aberrants telling them that they have to allow this behavior.
If the military allows abberant behavior on base or on-duty, then some leaders need to be retired. You don't keep people out of the military because the leaders are too weak to manage and enforce the rules of conduct.
I said what I have to say about showers above. Oh, and read what the other guy said before.
I supervised showers in several men's prisons for two decades and never made a move or fell in love.