I am one a guy who has known that there was attraction to both males and females for a long time and have accepted this in myself much more over the past several years. I had to address internalized homophobia to do this. There is a lot of misunderstanding out there when people are saying things like you are either gay or straight or not wanting to accept that you are one or the other. There are way too many people out there who are attracted sexually and romantically to both males and females for bisexuality to not be considered a genuine option in terms of defined sexual orientation. Fritz Klein has done some excellent work in this area...e,g, his book "The Bisexual Option" and he developed the Klein Sexual Orientation Grid (KSOG) which goes far beyond the Kinsey Scale in this area.