Regular breast massages may help prevent cancer, according to one study. According to the research, massaging the breasts can stimulate normal cell growth and reproduction.

Bras don't necessarily prevent sagging breasts: Studies have shown that bras have more positive effects on neck and back alignment.

Massaging a breast or nipple releases oxytocin to the brain, the same chemical that's released when you're hugged

2-6% of women and 1-3% of men have a third or fourth supernumerary or "extra" nipple.

The average erect nipple is about the same size of five stacked quarters.

Your nipples can leak fluid, even if you’re not breastfeeding.

Human breast milk is sweeter than cow's milk.

If you exercise without the proper layers, it can cause your nipples to chafe and bleed.

In China, you can get a degree in bra studies.

For most women, one breast is noticeably larger than the other.

Breasts don't contain muscle, so exercising won't keep them firm. Instead, exercise your pectoral muscles to keep your chest toned.

Smokers have saggier breasts than non-smokers due to the chemicals in cigarettes, which do their part to break down elastin in the body.

80% of women are wearing the wrong bra size, which can lead to back pain and indigestion.

Breast size is pretty much all genetics and weight. Interestingly, when you lose or gain weight, your breasts are one of the first part of the body to change.

Coffee can make your boobs more sensitive, according to one study about the effects of caffeine.

There are eight different types of nipples, including "puffy" and "inverted."

Men have nipples because all fetuses start out as females.

Women can walk around topless in Hawaii, Texas, Ohio, New York, and Maine. Don't strip just yet: Being topless is legal, but you can still get a ticket for being a public nuisance.

In Japan, some people either tattoo or use makeup to make their nipples appear more pink.

The most sensitive part of the breast isn’t the nipple, it’s the area right above it.

Approximately two million women in the United States have breast implants.

According to one study, some women can orgasm via breast stimulation: 1% of the women included in the study, to be exact.

The largest breasts in the world belong to Annie Hawkins-Turna, who has a band measurement of 43 inches, and an all-around chest measurement of 70 inches.