Some men believe drinking breast milk will increase their stamina during workouts as well as providing other health benefits.

"It gives me incredible energy I don't get from other food and drinks," Anthony from Queens, told New York Magazine.

Anthony buys the breast milk from willing women for $2.50 an ounce. He was getting it from a neighbor before but now he uses sites such as Only the Breast,

"I don't believe in steroids or other energy supplements, none of that garbage," he told New York Magazine.  "I want natural stuff that's God-given, and if it's okay with moms looking to get rid of it, I'll take it."

Some men believe the milk can contribute to overall health.

"It occurred to me that breast milk could be just as healthy and tasteful for adults as infants," 55-year-old Jason Nash,  who got a taste for breast milk after the birth of his first child, told New York Magazine. "I believe it has kept me from getting sick all these years."

Other men drink breast milk for sexual purposes.

"All I'll say is it's a fetish for me," a man wrote on Only the Breast, New York Magazine reported.

There may be some truth the claims that human breast milk has health benefits for adults. Some studies have suggested that breast milk contains a cancer-fighting compound.

Other experts disagree that breast milk has these health benefits.

 "This is quite bizarre, completely anecdotal and probably complete bunkum," David Kerr, the professor of clinical pharmacology and cancer therapeutics at Oxford University told the Telegraph, New York Magazine reported. "It probably won't do any harm, but it's unlikely to do any good either." 

Purchasing bodily fluids from strangers comes with its own set of health risks. The New York Times revealed that 64 percent of samples from breast milk-sharing websites were contaminated with staph; 36 percent of the samples were infected with strep;  and about three quarters contained other species of bacteria.

"I screen the producers by getting their medical records, and I meet them in person to make sure they don't have needle marks," Nash said in reference to the breast milk he purchases, New York Magazine reported. "I will not buy via mail, UPS, or FedEx."