The Bible provides one in Numbers , where Moses complains to God about the difficulties of watching over the freed slaves in the Sinai wilderness: "Have I begotten them, that you should say to me, Carry them in your bosom, as a nursing father bears the sucking child … " (There's a more literal reference in the Talmud.) In more recent times, Charles Darwin himself observed that "it is well known that in the males of all mammals, including man, rudimentary mammæ exist.These in several instances have become well developed, and have yielded a copious supply of milk." Since Darwin, male lactation has been observed in other animals, including the Dayak fruit bat, the domestic goat, and the guinea pig.Yet this fact of nature has been ignored, to the point where its opposite assumption—that men are physically incapable of producing milk—has been used to advocate for government control of human relationships. agree that men can't breastfeed," said attorney David Thompson, arguing against the 2010 appeal of California's gay-marriage ban, "and breastfeeding clearly has benefits for children in that it provides sources of immunity that are beneficial to children." The more I learned about male lactation, the more curious I became.

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Under normal circumstances, women have about one-third more prolactin coursing through their veins than men, and during pregnancy, they make more than 10 times as much.

The reproductive prolactin spike causes the breasts to swell and produce milk.

In theory, you don't have to be pregnant to start lactating—all you need is the hormone rush.

You don't see many men in the lactation section of Buy Buy Baby, but that's where I was when I bought my first breast pump.

I wasn't there on a mission for a pregnant wife or girlfriend.

I was preparing to test an obscure secret of biology: Men can lactate.While not widely known, the image of the breast-feeding male dates back thousands of years.I know I can't birth a child myself, but what if I could bear one to suck at my bosom?Could my rudimentary mammae yield a copious supply of milk?Given the challenge before me, I was pleased to learn that the production of breast milk is a relatively simple process.The breast tissue of both men and women contains small clusters of alveoli that produce milk in response to a hormone produced by the pituitary gland called prolactin.