see.. I knew we were brothers..
I think we'll find that humans and monkeys are not the only species that can figure out unfairness.Knowing when you have been ripped off is not solely a human skill, biologists have discovered. Monkeys can spot a raw deal when they see one, and if they are not treated fairly they throw a tantrum.
hell, we've seen jealousy in cats and dogs..
but now I know why I sing.. "I'm an apeman, I'm an ape-apeman, I'm an apeman"
read more here.>> http://www.newscientist.com/news/news.jsp?id=ns99994179