Honestly, I'm an unknown and discrete bisexual. I've been into a relationship with both genders. The thing is, when I was in a relationship with a girl (we had been together for around 5 years or so), whenever we were in public places, I still can't help to have that awkward feeling from people around us. Unlike when I were with a guy before. No matter what I did with the guy publicly, I don't get the discriminated feeling from people that surrounds us. I can only feel the relief and enjoy the company (to the fullest) with my girlfriend before when we are alone together.
Somewhat, I can't even talk to any of my friends that I had a girl before. But, I can freely talk about "yuri" genre with some of my friends that are also into anime/manga.
It's kinda like, the "acceptance" (in my case) of society for same-gender relationship/preference is still a bit of taboo.
EDIT:
That's why I love Dyansty-Scans. This is like heaven for me. :D
This sorta stuff has been irritating to know about to me lately, I did not really give a crap for anything of the sort before, guess I've been around here a lil too much and has changed me a bit... I actually get sorta pissed even if it has nothing to do with me nor anyone I personally know.