Just do it in front of me, I find lesbions hot, nothing behind my back. BISEXUAL girls are hot as hell, be proud to be bisexual , guys dig bisexual chick's. In fact on occasion I will give her right make out and fuck the other girl, but no where a dick should be near them, dildo are fine, and I should know all her activities, no secrets or she is cheating on me and I am done.
Both me and my girlfriend are bisexual. I am obviously not eligible for a non-bi opinion, but my knowledge of my male friends is that the vast majority wouldn't care if you were bisexual, just so long as you were actually into them.
Well, I'm bisexual, so I'm bi-ased (see what i did there?) but no. And I don't think it should bother anyone. Bisexual people aren't automatically sluts by default, and why would you worry about them cheating on you? Any person of ANY orientation could cheat on you! Also, to the straight guys who are potentially reading this, don't stereotype bisexual women into wanting threesomes! Maybe she does, but don't ASSUME that because she's bi, she wants to have sex with a girl for you.