#37: Keep it closed, friend
There’s not a person alive who wants to see what you’re chewing. No one wants to hear your lips smack, and it’s rude to chew with your mouth open – that’s something our parents teach us at a young age. Well, most of the time. You’d think this should be one of those things that we’re taught as children, but it’s obviously not a concept that everyone grasps.
If you don’t follow this unwritten rule, there’s just no excuse. You are probably enjoying what you’re eating, but your sloppiness is grossing other people out. Do the whole, big, wide world a favor and close your mouth when you’re eating. Anything less is doing humanity a disservice that can easily be avoided.