Michael Jackson and Bubbles by Jeff Koons, one of three life-sized gold-leaf plated porcelain statues of Jackson cuddling his pet chimpanzee.

Wild chimpanzees cannot be imported into the United States, but those that are born in captivity here can still be purchased as pets and used in biomedical research and entertainment.

But, if capuchins can manage to bring a stranger into their lives and keep it as a pet for well over a year, why don't chimps?