A little man has finally agreed to teach me wrestling!

The bad news is that my headbutting still needs to be maintained, although a doctor of mine says I should not headbutt in spite of my thick head and strong neck, because I have a damaged brain.

I am not permitted to butt or bite my instructor. How do I cross-train effectively, then?

A 6th dan black belt in bastardry.

"Damn you! You dirty fighter." My sparring partner, also disabled, recovering from being bitten.