Consider the diagram below. First a challenger decides whether to challenge an Ah Beng*, maybe by staring his girlfriend. If he decides not to stare, he does not win anything, and gets a 0 payoff. Subsequently, the Ah Beng happily hangs out with his girlfriend, and gets a payoff of 5.
*"Ah Beng" eludes simple definitions. Try Wiki for more.
Lastly, if the Ah Beng doesn't fight, his payoff is 0. This is smaller than the "status quo" payoff of 5 - his might "lose face", and even his girlfriend. Even so, this is better than getting arrested for assault. In turn, the Challenger gets a payoff of 5 from looking at the Ah Beng's girlfriend.
From what I've said so far, I think it should be clear that the Ah Beng will never fight when challenged. Working backwards, the Challenger will find it better to challenge than not challenge. If this were true, why do we still see staring incidents, and why do we not see guys openly ogling at Ah Bengs' girlfriends?