It doesn't bother me at all. I have male, gay, lesbian and all sorts of "other" types of friends that I hang out with, when I hang out.
Most of the time there are trust issues involved when your man or woman befriending the opposite sex is a problem.
Even if the other person wants to get it with your S/O the trust that he/she wouldn't cross that line should give you comfort.
I have male friends and my husband has female friends. We are not robots people. programmed to ONLY friend males if we are males in a relationship and vice versa. lol.
Folks kill me with these rules and boundaries we put on ourselves. Too much to think about, ISH hurts my brain trying to remember this invisible moral/relationship code of conduct.
Just BE. Because preventing your girl from hanging with dudes doesn't mean she won't cheat lol, so what is the reason behind not allowing her to have male friends?