I'm ok with it as long as the hetero men are permitted to shower with the hetero women, being as the homosexuals currently get to shower with their gender of choice. But that will never happen.
Real world: it's a MORALE issue, not a MORAL one. In a perfect world, it shouldn't matter. But just like I disagree with lowering standards to allow women/small statured minorities on police and fire forces, I disagree with doing anything that will lower the effectiveness of a fighting force. This certainly will.