Oh, I can tell you from experience that you're right. Once my wife started sucking & fucking my friends I had guys I hadn't seen in years suddenly getting reacquainted. But that still wasn't enough cum for her so we had to start finding groups of strangers to satisfy her craving for hot cum on and in her.
I love it, when we were in the lifestyle I watched my sexy wife take load after load after load of hot cum all over her face & tits from dozens of guys in one night and loving every drop of it.