I don't get it for losing to a Mandalorian. = You must defeat a Mandalorian to obtain Beskar. = Kick Mando Shebs, get Beskar.
Oh, I see what you mean. Cortosis confused with Beskar. o.o
Never mind.
You can try your hand at kicking my ass, but it won't be easy. There would be a certain irony to it, in fact....