Lately for no reason I've been imaging a somewhat close friend of mine, good looking guy, above average cock..fucking my GF. He lives right next door to me and we talk all the time about sexual stuff and I know he thinks shes hot. After talking to my GF about this fetish she seems somewhat open about it as long as I'm comfortable with it...but how do you go up to your friend and be like "Hey wanna bang my GF?". I'm 20, my friend is 18, my GF 19...all young people. Also, is there a name for this sort of fetish? Any advice on this topic would be appreciated. Thanks