opposites don't work with fur

dear evolution,

i love cats.  i love having cats as pets.  i love that they snuggle with you when you don't feel well as they are inclined to do right now, since, well, i don't feel well.

i think you, evolution, have done an excellent job with the design of a cat.  that whole landing on the feet thing is brilliant and great fun for all.  the soft fur, the purring that lowers your blood pressure.  and best yet, the ears that turn inside out on an occasion and have the ear hair sticking straight up.  so endearing and funny.

but evolution, i have one minor problem.  you left out the opposable thumbs.  you see, what good are cats to me if they can't go and get me a coke.  i ask each and every one of them to go and get a coke and they just stare at me, stare at their paws.  ahhh the opposable thumb.

i know this was so humans could be on top and all, but i would be willing to sacrifice some of the power for a cat that can get me a coke.