Bisexuality is a sexual orientation which refers to the aesthetic, romantic, or sexual attraction of individuals to other individuals of either gender or sex. A bisexual person is attracted to both men and women.
A bisexual may be more attracted to one sex than the other, attracted equally to both, or find people's sex unimportant. The strength of their attractions to men and women may vary over time. Bisexual people are not necessarily attracted equally to both genders.
Due to the nature of bisexuality as an often ambiguous position between homosexuality and heterosexuality, those who identify, or are identified, as bisexuals form a heterogenous group.
Some view that bisexuality is a distinct sexual orientation different from heterosexuality or homosexuality. This views bisexuality as something clearly distinct from these other two sexualities, with a clear attraction to both men and women required.