I've seen this shit in porn recently, and even a friend of mine as told me he would like to see some random guy pipe down his girl. What in the absolute fuck is this? He told me it's because it turns him on to see his girl with another man. Are you fucking kidding me?

I may be a 20 year old virgin but I have enough common sense to know already that I would not want to see a gf with another guy. Seriously what's the idea behind this?