i fail to see how acrobatique's expression of a bisexual relationship is anything other than a polygamous relationship.
the way marriage is currently structured, it is a two-person contract. in many states, it is one man/one woman. this is beginning to change, and rightfully so.
i don't see how the illegality of polygamy infringes upon the rights of bisexuals. it seems to me that it infringes upon the wishes and desires of those who wish to be in a polygamous relationship. it seems to me, acrobatique, that you are arguing for polygamy, not for the extension of rights to bisexuals. bisexuals are already 50% there. if you fight for marriage equality, a bisexual will have 100% the rights of a gay or a straight person the right to marry whomever he or she chooses.
if you wish to marry two partners, that is polygamy. the sexual orientation of the participants is secondary to the structure of that relationship.
what you seem to be arguing is that polygamy must be allowed so that the rights of a bisexual to have their preferred relationship recognized and protected by law are not infringed upon. and i don't yet buy that argument.
no one argues for gay marriage because they think that anyone has the right to get any relationship whatsoever recognized by the government. *maybe* that should be the case, but that is a separate argument than the one i am concerning myself with.
my argument is the following: we have an institution known as marriage that confers a series of tax incentives and social respect to the two people who enter the partnership. traditionally, this partnership has been entered into by men and women because heterosexuality is the most common sexual orientation, and this is the only sexual union that can produce children. however, this is a discriminatory institution for a variety of reasons, and there is a whole class of people -- gay people -- who are completely forbidden to recognize their relationships that are entirely the same as any heterosexual relationship, the only difference being the same-sexed pairing of the two partners. it is part of the genetic make up of a gay person to be attracted to a person of the same sex in the way that it is part of the genetic make up of a straight person to be attracted to a person of the opposite sex. thus, the barriers set up between same-sex marriages are no different from the barriers that were once set up between different race couples. opposite-gender pairing is no longer a necessity (if it ever was) and many straight couples live as if they might as well be gay (i.e., no kids) and marriage is now about personal choice and an expression of love and commitment, not to mention a tool that people use to stabilize their lives.
that's what we're about.
what you haven't yet grasped is that you *are* arguing that if we are to allow people to say that it is natural for them to want to be with the person of the same sex, it is natural for some bisexuals to want to be with one person of the same sex and one person of the opposite sex, and thus a polygamous relationship should be recognized by law.
but there's much more going on here. working for marriage equality isn't a "free to be you and me" movement. it's much more conservative than that. all gay people are asking is to be allowed into the institution, not to turn it into a one-size fits all legal arrangement.