MrSpoc - no-one's explained why it's ok, because it isn't ok. If you were to deign to read the thread you would see that plenty of people have explained this already.
I've also been to a gay bar with a boyfriend. We even kissed in there! I did joke with him that maybe we shouldn't because it's only just about alright to BE straight as long as you don't rub it in people's faces :o No-one gave a toss, of course.
Hope this doesn't sound too patronising but I really like seeing gay and lesbian couples walking around hand in hand, or otherwise publicly demonstrating that they are more than just friends. So many years of being under threat of prison (for the chaps) or being an outcast, and the continuing threat (as this thread/case shows) of being looked on as different, weird, disgusting or just plain wrong. All now - HOPEFULLY - coming to an end.
Like all discrimination, the more you think about it, the sillier it seems.
"so, you're discriminating against this person - why's that then?"
"because they have sex with men"
"and? I have sex with men"
"well, yes, but you're a woman"
"so do they abuse vulnerable people or something?
"well, no, all consenting adults"
"oh...right. And the fact that they like having sex with other consenting adult men says something about their general personality, likeability and worthiness as a person because...?"
"well, because...um..."