Brains don’t help in most situations. In fact, they’re often a liability. People don’t like smart guys, they like sincere, hard-working normal Joes. So if you happen to be extremely intelligent, don’t wear your smarts on your sleeve. Keep them secret and use them in situations where a favorable outcome will make you seem simply lucky.
All the best film actors know this trick. Play stupid and you’ll make the audience feel smart. Let them see you strain to make sense of your character’s predicament. Allow them to see the wheels turning in his or her tiny brain.
Sympathy begins to have a chance when you stop threatening people. Stupid people know this deep-down, and use it to their advantage whenever their intelligence fails them. They affect a puppy-dog look complete with big, watery, sad eyes.