Have done it with a mate quite a few times. its hot cos I send him a text saying " hows that hot fat cock of yours" and if hes available he will reply " my cock needs your mouth now"
I go straight there, we both get naked, I give him the usb with the porn and he will tell me what he wants to watch, usually my gf fucking, ex wife masturbating or other filth. he and I both enjoy sucking cock so usually when we cum its in the other guys mouth.