S & M
Definitionsadism and masochism or sadomasochism.
(1) Anonymous joke. ' -- Why do you hang around with that sadist? -- Beats me.'
(3) Ellis Fielding (Dan Aykroyd) and MacArthur Stern (Gene Hackman) in Loose Cannons (1990):
-- Ellis: ' S & M club? Like sadism and masochism? '
-- Mac: ' Yeah, you know, you scratch my back, I'll scratch yours, only real hard.'