Heh... I'm vegetarian (okay, how predictable and I becoming around here these days?), but not vegan (a huge step, much harder than just becoming vegetarian) that I should really take. Unfortunately I love dairy products (although it is an evil industry) and especially milk... yum. I'll take any kind (unless it comes out of manboobs
).
Here is an excerpt from:
http://www.straightdope.com/classics/a1_093.html
Anyway, both male and female babies are born with the main milk ducts intact--the gland that produces milk is there in the male, but it remains undeveloped unless stimulated by the female hormone, estrogen. Occasionally, a male baby is born with enough of his mother's estrogen in his body to produce a bizarre phenomenon known as "witches' milk," with the male glands, suitably stimulated, pumping away at the moment of birth.
In the adult male, the dormant glands can still be revived by a sufficient dose of estrogen. Actual lactation is rare--only a couple cases have been recorded. But at least one writer (Daly, 1978) has suggested that the "physiological impediments to the evolution of male lactation do not seem individually surmountable." Meaning we may yet see the dawn of the truly liberated household.
