Well, it turns out earwax says a lot about a person. It comes in two varieties: moist and gloppy, or dry and flaky. (The wet kind is more common in Americans, Europeans, and Africans; the dry type more frequently found in Asians and Native Americans; both types are also found in chimpanzees.) A few years ago, epidemiologist Nicholas Petrakis at the University of California San Francisco found evidence suggesting earwax contains hints of a woman's risk for contracting breast cancer. Ears and breasts both contain apocrine glands, and women with too much apocrine tissue-and moist earwax-have a tendency to form breast cysts. Finding the gene that orchestrates apocrine development might one day help doctors predict a woman's risk of developing the disease. In addition, people who have moist earwax tend to have more pungent body odor. Armpits also contain apocrine glands, which secrete oily chemicals that stink-producing bacteria feed on. So the earwax gene might also clue researchers into ways to better fight B.O.