Why do people say, "you've been working like a dog" when dogs just sit around all day?

Happy New Year! Hope another year cheers and happiness is ahead of us. Year 2005 was good for me, I think I matured fair enough, personally and career wise. Hopefully this year will be better because according to the chinese zodiac its my year, year of the dog!! So what's with people born under this sign?

People born in the Year of the Dog possess the best traits of human nature. They have a deep sense of loyalty, are honest, and inspire other people's confidence because they know how to keep secrets. But Dog People are somewhat selfish, terribly stubborn, and eccentric. They care little for wealth; yet somehow always seem to have money. They can be cold emotionally and sometimes distant at parties. They can find fault with many things and are noted for their sharp tongues. Dog people make good leaders. They are compatible with those born in the Years of the Horse, Tiger, and Rabbit.

You are honest and faithful.
You can worry too much.
You will make an excellent business person, teacher or secret agent.

Somewhat selfish, stubborn and eccentric. Hehehe.. I think we have to be like that sometimes. As Flea of Red Hot Chili Peppers said, "controlled violence is good. All of us have it."

Update later. Got some programming job to do :-)