I personally think threesomes are fine, if your relationship can handle it. Some, actually most, can't handle it. Most people are very jealous and when they actually see their SO with another person they can't handle it. If you are in a relationship where you both are really into it, it can be great. I have no problems sharing my woman with another woman, but have yet to share with a guy and don't think I could. I am not attracted to guys and would not have sexual relations with one but see nothing wrong with tag teaming a girl if it just sex. If that girl was my own, I don't think I could do that. After all I would be sharing mine and getting nothing in return. We have a married couple we are good friends with that my wife slept with his wife in front of us and I was comfortable with that. Now we are talking of swapping wifes, could be fun or could go terribley wrong. With a FFM, that would be great because my wife likes women anyway so she is benifiting the same as I am.