I've known I was attracted to girls as long as I've been attracted to guys. I never considered myself greedy, although I think it tends to be a bit more difficult than either being gay or straight. For one, straight people accuse us of being bi-sexual to get attention or as a ploy to attract guys. Gay people accuse us of being greedy or fickle. Ya know, pick a team already?
I guess I never considered my sexual orientation as some sort of upper hand in the dating world. It honestly didn't broaden my options any, as I was picky about my choice in mate whether male or female. And, in truth, it makes dating more difficult. When trying to date lesbian women, being bi-sexual was a real nail in the coffin as they wanted to be with someone that was strictly same-sex oriented. And men typically foamed at the mouth and immediately asked for a threesome. I did have a relatively lengthy relationship with another bi-sexual woman who ended up breaking things off with me to move in with her ex-boyfriend. I guess for me, the thing about seeking attention or being greedy was always kind of a slap in the face. It wasn't like I got drunk and kissed a gal pal in a nightclub and then *poof*, I was magically bi-sexual. That is why most people who do not understand varying degrees of sexual orientation. People assume that it is strictly who you are sexually attracted to. Most women would be willing to kiss another girl and it may even be a turn-on, but many women would not be willing to carry on an intimate, romantic, long-term monogamous relationship with another woman. That, in my opinion, is the big difference. Just because you made out with your roommate in college does not mean you are bi-sexual. For me it was always about being able to find some sort of emotional compatability with both men and women.
And I feel even worse for bi-sexual men. They face the same problem dating members of the same-sex (the prejudices against those of us who just can't pick a side), but most women are sort of weirded out about men who are equally attracted to other men. At least most men can look past having a bi-sexual woman in their lives, but most women cannot.