Okay, I can see how that might work. It takes a certain faith to believe that relationships can have value beyond sexual gratification, and both people need to have enough commitment to that idea in order to make it a reality.I kinda get where you're coming from with this, it's more an argument for homosexual attraction not being "a choice" or "a lifestyle" though, because if you had to choice to be a social outcast, why would you? It's not even good for oppression points any more unless you're a minority, in which case you'll have the same spot on the progressive ladder anyway.
As for how to pertains to bisexuals though, I think it's a depressingly shallow view of relationships. I don't specifically love my fiance because of his penis, there's all the other things that draw me to him that would still be true even if you took the sexual element of the relationship away.
This is why poly people and the hedonistic tendencies of the LGBT community piss me off so much. It pressures anyone who falls under the “queer” umbrella to reject that faith altogether. That atmosphere is too cynical for me.