Monosexuality is romantic or sexual attraction to members of one sex or gender only. A monosexual person may identify as heterosexual or homosexual. In discussions of sexual orientation, the term is chiefly used in contrast to bisexuality, or pansexuality and various other gender-inclusive or gender-neutral identities. It is sometimes considered derogatory or offensive by the people to whom it is applied, particularly gay men and lesbians.
The Kinsey Reports found that, in experiences leading to orgasm, 63% of men and 87% of women could be described as "exclusively homosexual" or "exclusively heterosexual", and thus monosexual.
Alternative definition
The term monosexuality has also been used in contrast to polyamory (which is commonly confused with polysexuality), which is used to refer to people who desire or fantasize about sexual relations with more than one partner. Under this definition, a monosexual person desires sexual relations with only one partner and (like polyamorous people) may be homosexual, bisexual, or heterosexual.