Basically there are three main kinds of romantic attraction, sexual attraction, or sexual behaviour of a person like bisexuality, heterosexuality and homosexuality
In simple term Bisexuality is an one kind of a sexual behaviour of a person in which a person is sexually attracted to both the male and female sex regardless any sex or gender identity.
One popular definition of the Bisexuality is given by activist Robyn Ochs who defines bisexuality as "the potential to be attracted—romantically and/or sexually—to people of more than one sex and/or gender, not necessarily at the same time, not necessarily in the same way, and not necessarily to the same degree" provides all the information on hendon escorts.
From Rosario, Schrimshaw, Hunter, Braun (2006):
...the development of a lesbian, gay, or bisexual (LGB) sexual identity is a complex and often difficult process. Unlike members of other minority groups (e.g., ethnic and racial minorities), most LGB individuals are not raised in a community of similar others from whom they learn about their identity and who reinforce and support that identity. Rather, LGB individuals are often raised in communities that are either ignorant of or openly hostile toward homosexuality.