"When you place an openly gay man in this environment, it causes hostility. Many men don't want to associate with gays, let alone have one showering with them. The friction impacts the unit mission and causes a major distraction."
Okay, that's an example. This really must be a man thing. Because I am so heterosexual, that there would be no tension at all if I had to be in close quarters with a lesbian. I like men and nothing she would do could affect my job performance.
What if she was your superior officer and used her authority to sexually harras or molest you? Or what if she kept her "favorite" away from dangerous ops and put you in her place?
Big difference between lesbians and homosexual men. It's not a fair comparison. Neither is the insinuation that you are somehow more hetero than a man who objects to his workplace turning into a bathhouse (which is what will happen if you give them the opportunity).