That’s in part because heterosexual women are far more willing to engage in sexual acts with another woman without it impinging on their sense of being heterosexual. Males, it seems to me are just not wired to do that. Also, I must admit that even confident as I am in can still be a bit unsettling to observe the highly intense response that one’s partner can have when copulating with a stranger or near stranger. Many men get unnerved by that and have trouble coping with the emotional response that it brings out. However, if a man can work through it I can testify that he will end up with a very happy woman indeed!