I never really understood why fighters have such a big problem with it. Its just a sport, they train everyday to be the best fighter what is the big deal with competing against each other? A guys Like DC and Machida put their own careers on hold just so they dont have to fight their friends its pretty dumb IMO. DC should have no problem fighting Cain for the belt its just a competition to see who the best fighter is, they dont have to be enemies to compete. I would fight my own brother if they paid us enough. i would even train with him for the fight LOL.