So this has been said over a number of times on this subreddit. "Your girlfriend having guy friends is a red flag "."Don't let your gf hang out with other dudes "

It's almost impossible for a person to have just one person known from the opposite sex (you).

The question is : 1) Under what conditions is it acceptable for your gf to have a guy friend? 2) How do you bring it to her notice that you don't like it? If you do that wouldn't she accept the same from you?