How to Un-Share your E-mail Address with Pet Society (and other Facebook games)

Did you have trigger-finger and clicked yes to this message without reading it?

If so, there's a way to undo the damage. It might be as simple as just clicking "Unsubscribe" from any mail sent by Pet Society. But here's another sure-fire way to get rid of the notices for good. Go to the "Settings" link near the top right corner of Facebook. Click "Application Settings."