You can, but only if the woman is lactating. This means that her body is making milk. This might happen when she had a baby and has too much milk, or she might be taking hormones to make her make milk. There's no difference from a baby and a full-grown person drinking milk from the nipple. However, it may be painful for her, because babies have few if any teeth, and you probably do. There's no reason you can't if you are careful and she's willing and lactating!
Yes
Yes. Male breasts have milk ducts.
Mammary glands are the source of milk production in female (and some male) mammals
No
yes
I think no.
Only mammals make milk, hence the designation mammal, as in mamillary. Avians such as ducks don't produce milk hence there is not milk before ducks.
Not normally
Each breast contains a cluster of alveoli or sacs in which milk is produced. The alveoli release the milk into ducts, which work like pipes to take the milk to the nipples Mammary glands produce milk in mammals.
Generally only female goats produce milk. However, on very rare occasions male goats may begin producing milk.
Yes, in theory, men can breastfeed. Male breasts have milk ducts, and some mammary tissue. They also have oxytocin and prolactin, the hormones responsible for milk production. There have been reports of men who were able to produce milk through extensive breast and nipple stimulation, but no one knows whether the milk was of the same composition or quality as the kind women produce. Using a pump, or a feeding tube (a small silicone tube attached to a plastic bottle filled with formula) at his breast, he might be able to get a baby to latch on and suckle, but how long it would take to produce even drops of milk is anyone's guess.
lactiferous ducts
Breast milk comes from the milk ducts in a female's breast.