Foremilk, the milk released at the beginning of a feed, is watery, low in fat, and high in carbohydrates relative to the creamier hindmilk, which is released as the feed progresses. The breast can never be truly "emptied," since milk production is a continuous biological process. Let's discuss this topic, how do women's breast milk taste like? is it good to take it for adults?
Regarding Rod's advice that human breast milk has similarities to evaporated cows milk:
All Mammalian species produce milk, but the composition of milk for each species varies widely and other kinds of milk are often very different from human breast milk. As a rule, the milk of mammals that nurse frequently (including human babies) is less rich, or more watery, than the milk of mammals whose young nurse less often. Human milk is noticeably thinner and sweeter than cow's milk.
Whole cow's milk does not contain sufficient vitamin E or essential fatty acids. Whole cow's milk also contains excessive amounts of protein, sodium, and potassium, which may put a strain on an infant's immature kidneys.
In addition, the proteins and fats in whole cow's milk are more difficult for an infant to digest and absorb than the ones in breast milk.
Evaporated milk may be easier to digest due to the processing of the protein but is still nutritionally inadequate. A significant minority of infants are allergic to one or more of the constituents of cow's milk, most often the cow's milk proteins.
These problems can also affect infant formulas derived from cow's milk."
My wife is a midwife and we have a 1-month-old child breastfeeding right now.
My wife and I think it's more watery than cow's milk even. Ie In a container, my wife says it looks like skim milk with some fat on top.
There is certainly a psychological barrier to drinking breast milk - but apparently, that is not a barrier to more instinctive sexual activity - like in the middle of the night - and like I don't remember doing it.