A sadist, a masochist, a murderer, a zoophile, and a pyromanic

A sadist, a masochist, a murderer, a zoophile, and a pyromanic are all sitting on a bench in a mental institution. "Let's have sex with a cat?" Asked the zoophile. "Let's have sex with a cat and then torture it" says the sadist. "Let's have sex with a cat, torture it and then kill it" shouted the murderer. "Let's have sex with a cat, torture it, kill it and then have sex with it again" said the necrophile. "Let's have sex with a cat, torture it, kill it, have sex with it again and then burn it" said the pyromanic. There was silence and then the masochist said: "Meow"