Since late 2016, lethwei has been my life. I love everything about it. The tradition. The ritual. The training. It's the purest form of combat out there, and if muay thai is the art of eight limbs, lethwei is the art of nine. The ninth point of contact? The head.But let me back up. If you weren't clear before now, this is all about bare-knuckle fighting in which the fighters not only throw punches, kicks, elbows and knees, but also head-butts are perfectly legal. CTE be damned.