For me, and the other guys in our group of couples, it depends. When the conditions are right (multiple female partners available, maybe one of them new, watching my wife enjoy herself with someone else, which turns me on) I can easily go twice or thrice with little down time. But that doesn't necessarily make it better; a slow fuck with another guy's wife who I've fucked many times before, oral afterwards just to keep things going, then an hour or so later with another woman, my own wife perhaps, to finish off the evening can be just as good.