[savedbygrace]

I say give 'em both knives, tie their left wrists together, and let 'em have it at.

And whose wrist would Schumer slash, d'you suppose?

[Joe Brower]

"And whose wrist would Schumer slash, d'you suppose?"

With any luck, his own.

But that's not the idea. The two adversaries are lashed together by one wrist each so they can't get away from each other. The other hand holds the blade. Your opponent's wrist is typically not the best target in such a scenario.