There seems to be a lot of concern here about some percieved "additional risks" of losing someone who is bisexual. Is it that they have more potential suitors? I'd think it depends on the individual more than the orientation.
If being bisexual generally means that a person can never have fulfilling and satisfying sex with only one person (or sexual gender), then it might require a negotiation of conditions and terms of behaviour that are likely to work as a couple.
Is it monogamy? That's customary in the bulk of relationships, based on customs and perhaps the morality one is raised to value and believe is correct.
Is an open relationship with limits?
Is there room for outside sex? Is there room for an outside lover for whom deeper feelings of affection and love can be accepted as not threatening?
In the open relationship is it also agreeable for the straight partner to have lovers on the side?
I raise these questions because a bisexual woman I know insists that in any relationship she has with a guy, she must be able to have a female lover, otherwise she could not be happy. I asked if her hetero male partner could then sleep with other women, and to my dismay she said no.
Her argument was that she, as a bisexual, had a desire for sex with women, which was a essential need that her male partner could not satisfy because of his sex. If her male partner was bisexual, she saw nothing wrong with him having a male lover, for the same reason. However, IF he slept with another woman that would indicate that he found sex with her unfulfilling, so it would be cheating, and grounds for the end of the relationship.
I thought that was extremely illogical. Monogamy is totally un-natural to start with, and we only agree to limit our sexual partners to either simplify and reduce risks, and out of the desire to demonstrate actions that attest to our partner that they are special, and worth the effort. And to concentrate our affections into the package we revere as "love".
I have had several lovers who were bisexual women. I observed interesting variations in what it meant to them to be bisexual. Some had lived as lesbians for a time. One was always in a male-female couple, and had flings with girls on the side. One said she could only be in deeply in love with a man, but loved fucking women. It was funny that we could look at women together, and share observations about their attractive qualities, in that most straight women find that threatening or disrespectful. They were creative, crazy funny, intelligent and uninhibited in many ways. Some had nasty childhoods involving sexual abuse. Unique individuals, all of them.
The relationships were fairly short, so we never got to the point where we made any plans together. More than one offered to bust my 3some cherry by getting a female to join us. Nothing ever happened. Talk. Just talk I tell you. :tongue: