The Bisexual Manifesto, published in 1991 in the issue #3 of Anything That Moves:

“We are tired of being analyzed, defined and represented by people other than ourselves, or worse yet, not considered at all. We are frustrated by the imposed isolation and invisibility that comes from being told or expected to choose either a homosexual or heterosexual identity.

Monosexuality is a heterosexist dictate used to oppress homosexuals and to negate the validity of bisexuality.

Bisexuality is a whole, fluid identity. Do not assume that bisexuality is binary or duogamous in nature: that we have "two" sides or that we must be involved simultaneously with both genders to be fulfilled human beings. In fact, don’t assume that there are only two genders. Do not mistake our fluidity for confusion, irresponsibility, or an inability to commit. Do not equate promiscuity, infidelity, or unsafe sexual behavior with bisexuality. Those are human traits that cross all sexual orientations. Nothing should be assumed about anyone’s sexuality, including your own. We are angered by those who refuse to accept our existence; our issues; our contributions; our alliances; our voice. It is time for the bisexual voice to be heard.”

Copied it from: http://www.bisexualorganizingproject.org/whats-up/bi-pan-and-the-insufficiency-of-prefixes