I don't get where being bisexual is of import in this debate at all. Do you think the sexuality of the girl changes the situation somehow? I hope not, I've had enough of people saying people like me are more likely to cheat because we have more to choose from. Cheating is a decision, and someone that wants to cheat will do so; how easy it is to cheat makes little difference on their mindset. On the other hand I can see the difficulty of being with a bisexual person, because, for instance, when I'm with someone I get very jealous if they're spending alone time with someone of the opposite sex (if I trust them I don't mention it), but I don't mind them spending time with the same sex. If that person is bisexual, however, I'd probably jealous of them spending alone time with anyone. Perhaps that just shows my lack of trust and demonstrates more about my relationships than anything else though.

I have a (girl)friend who told me she cheated on her ex three times. This is a girl I agree with on a lot of things, and she's by no means unintelligent or immoral. She said it was because she felt "trapped" in her relationship, but didn't want to end it because she really liked the guy. Personally, I can't even comprehend feeling that way, let alone feeling the best way to resolve it is to cheat rather than get through your problems as an adult.

I've been with a girl while she was with someone else (so I guess that makes me a cheat...ee?). I justified it in my mind by saying that a) It's her that's doing the cheating, and I have no obligation towards her girlfriend (she's bisexual haha); b) not only do I have no obligation towards her, but I don't care in the slightest because she's not a nice person (for reasons I won't go into). Looking back, these aren't really valid excuses, but we all make mistakes, and I can still rationalise my decision even if it was wrong. Plus she's the only girl that I've ever loved.

What's your opinion(s) on the person that someone does the cheating with? I'd like to hear your opinions.

Quote from Jeff

My girlfriend is bisexual and this is something I worry about. We've both established early on that this is a monogamous relationship and that I would be uncomfortable with her being intimate with any other person of any gender.

I'm going to be really pedantic here but gender =/= sex
You're referring to sex, the biology and do so in every other part of your post
Gender is the social and cultural differences rather than biological ones. Ironically enough saying 'any gender' still kinda includes everyone that saying 'any sex' would.

Quote from Skeletonxf

Gender is the social and cultural differences rather than biological ones

incorrect; it is just more commonly used to describe cultural differences. it still describes the state of being either male or female, and is probably a clearer choice of wording considering that 'sex' is also used to describe intercourse.

his point is easily understood regardless, so it's really a moot point anyway.