"Coming out" to future partners...?

[montana]

Okay so I don't like labels, but I've been with and have had feelings for people of both genders. I don't keep it secret, but I don't tell anyone either or say "I'm bisexual". Is it dishonest not to disclose to partners in the future that I have been with both? It's just I don't want a guy to think 1) that he can get a threesome cuz he can't or 2) that I will leave him for a girl.

It sucks cuz lesbians think you're not gay enough and are just experimenting and straight guys think you'll go back to women.

I'm not ashamed of who I am. I don't talk about specifics of my past that much to anyone of any orientation (or regular friends) for that matter. I just want to be who I am and do what I want but I would never want to be dishonest to someone I care about in the future.

Anyone have experience with this? How do you explain it to partners, particularly to the boys? What reactions have you faced?

Thanks!
I should also add that I worry about letting the person know and then that defining me forever, to friends, family, etc.

It's easier to tell girls though because guys expect a girl to just like guys just because it's the norm....

What about with people who aren't yet in serious or potentially serious relationship territory?

For example, I was talking to a straight guy and he asked about when my last relationship was. I brought up the conversation but it was hard to answer his question without putting it all out there. He was just a friend-type-person so I wasn't going to say "Yeah I slept with her a year ago" but I don't want to be evasive.

Sigh..

[MontyB]

It sucks.

I know exactly what you mean, I try to avoid the label bisexual because when I'm attracted to girls I feel straight and when is guys its gay.

Personally I think I'd want to make it known to a partner because I would always feel like I was hiding something if I didn't tell them. The only guy I've been with knew and it didn't bother him but I get the idea he doesn't believe in being attracted to both sexes.

All in all it's your decision to tell them or not, you'll know if it feels right or wrong to do it, trust your judgement.

If you find a failsafe answer though let me know :P