Even dogs get jealous. According to this article, dogs acquired learned jealously from spending large amounts of time with humans. If a different specifies can pick up and absorb human emotions, what effect do other humans have on our personalities?
This jealous dog is proof that I should make a conscious effort to stay away from negative people; emotions spread like margarine out of a tub.
But then again, how different is jealously from inspiration? Both evoke feelings of desire by showing you something that you don’t have, but could.