What is the mental disorder which describes someone who loves to fight?!

I know. They used to call it simply having anger issues. <BR><BR>No. It is not bipolar. I'm talking about somebody who is always searching for an adrenaline rush. Somebody who loves being in feared places and loves to feel threatened. I don't know exactly how to explain it. But they crave fighting as a gateway and stress reliever. I can understand guys. Hey. We go in back alley's and duke it out to relieve stress. Women like to talk... :p