possibly noteworthy wrote:

The next time you come face to face with a dog wagging its tail, you can make a quick determination on whether to reach out and pet it or step back in deference: check the tail-wag bias. If the wagging tail leans to the dog’s right, you’re safe; if the tail leans to the dog’s left, don’t move.

What if the dog is neurotic, bi-polar, ADD, or left eye dominant?

RE: Wag the Dog