Bah, some people flaunt their wealth, or their knowledge, or their social class, or their physical prowess, or their body shape, or the tone of their voice... we're a species that can exhibit this behavior. It's part of our social glue, it plays a role in our decisions regarding whom to associate with, whom to follow, whom to avoid... we do it all the time.
Personally, I like it when social norms are challenged now and then, it keeps society from becoming inert and petrified. When I was young...nger, my corner of society was busy flaunting our disregard of the norms - we had colorful mohawks, nonstandard jewelry, non-standard relationship styles, and torn, mismatched clothes.
That said, there are in any population always some who will use any opportunity to be obnixious just for the sake of it. That is not tied to any particular type of sexuality or gender identification, as far as I can tell.