Chimp Quits Smoking

Smoking China Chimp Kicks Habit

If scientists could nail down the real reason why Ai Ai kicked the habit, they'd amass a personal fortune. (Why don't public health officials clamor for this research? It would save a bundle in healthcare costs - smoking is the leading cause of preventable death in the US.)

So, what was it?

Was it the morning walks?
Pop music on a walkman?
Fried dishes and dumplings at every meal, on top of bananas, rice and milk?

Is there another clue in the following story?

Frustrated Chimp Takes Up Smoking

Seems Feili took up the habit to quell a growing shrewishness. I'm not sure what to gather from this ... don't become a shrew?