lets take a step back i think we are starting to miss the forest for the trees...that is just a real life example of the broader point
straights are not allowed in locker rooms of those they find sexually attractive, why is it ok for gays to be in locker rooms with those they find sexually attactive?
No, it's not a broader point. It's a non-sensical red herring that has no relevance to the "forest".

You've stated multiple times that you consider homosexuality behavioral, so why would bathrooms be segregated based on behavior?
Furthermore, here's a question to which I would honestly be interested in reading your answer:
HOW would you go about sorting out who was allowed into which bathroom? Would you place interrogators at the doors of bathrooms to find out who is gay? Would the bathroom doormen deny someone entry if they think the suspect is lying? Would gay guy be allowed into a men's room only until he began humming showtunes, at which point he'd be committing a crime? If homosexuality is, in fact, behavioral and sexual activity is prohibited it pretty much all restrooms and locker rooms, regardless of sex, isn't this a moot, stupid and irrelevant point?