I've been thinking about this subject a lot more lately. Maybe not particularly just breast trauma, but any lasting traumas in brawls. Obviously I love death fights, but that's a guarantee that its over. Lets face it, the loser wouldnt know it afterwards, they're dead after all lol.
I think a fun genre that could be possibly explored is the in-between isle of catty and death. A fight, whether small 1v1 or even massive brawls where some survive with surface wounds, some could get killed in the process, and then the some that have the lasting injuries, perhaps a loss of a limb or appendage. I think say, a mother of two would be a constant reminder of her mostake should she had gotten smug in her agreements and now has to live her life in a wheelchair because her opponent snapped her spine like a ragdoll. Or the secretary who cant type as well anymore because three of her fingers got chopped off during a battle. Or even something more visual to the outside world like pluck gouging an eyeball or biting a chunl out of a cheek.
I think its very hot to have two or more people that are willing and ready to risk such rules (or lack thereof) knowing it could be as little as a chunk of hair (less preferred for me) or an early grave, or anything else in between and yet they still go at it for whatever reasons it might be. Even hotter if theyre risking all of these for no reasons at all, just seeing who is better.