Remember Fight Club? About how it was the coolest movie ever when you were nineteen? And how a few years later you got the politics?

Maybe a furry transformation fight club? Two humans enter. A human and furry leave. Any martial art is accepted.

The catch is the violence transforms instead of damages. So you end up growing fur. A tail. The opposite genitalia.

The kicker is being hit in the head physically changes your mind. So you end up with the brain of a furry cliche.

The first rule is tell everyone. The second rule is tell everyone.