The cute mailman told me I looked nice today. Actually he said my dress was nice – but it’s sort of the same thing when you are desperate for compliments, which I am.
So there you go. If you do good deeds for people, like giving someone 4¢ or letting them go in front of you in the line at the grocery store, you will be repaid with compliments from the cute mailman.
And that folks, is how karma works.