Originally Posted by BlackUnicorn
This is such a common reaction, believe me! I think a lot of it is based on the thinking of 'Okay, my gf is bisexual, so another woman will give her something that I am never able to, and I can see how she might be more fulfilled with both. But another dude?!? Now what does he got that I don't?'
That's a very good point, and the only thing I can add is my own experience. My partner started a relationship with a close friend of us just a few weeks ago. They haven't had sex yet, but they have been intimate, and that neanderthalic ghost is swinging his club at me. The one thing that really helps me in this was to TALK to my partner about him. She is *very* clear on him being fundamentally different, personalitywise, than me. It's important to remember that this also defines how he is sexually.