"A sadist is always at the same time a masochist" Sigmund Freud?

I never heard about that conception. My sadist friends tell me its about giving pain not receiving it. And the masochist say they injoy the pain. Now who do you think is in the know, the psychoysis or the players? We are aware that Aristotle was not playing with a full deck, whitch made him a well rounded fellow. His time has ped, lets deal with the present. Thanks for his input.