Why do men have nipples?
Why Men Have Nipples
It's left over from early fetal development - at a certain point we
were just a fetus with an undetermined gender, and then a flood of
hormones came along in utero and told us what gender we were going
to be. Nipples are a leftover from that time. Men do have mammary
tissue, anyway. Just a tiny, tiny bit of it.
During conception, each fertilized egg starts out with an X
chromosome (from the mother) and an X or Y chromosome from the
father, which determines their gender. XX will be a female, and XY
will be a male. During fetal development, what started out as an
undetermined gender gets developed during the fetal stage into a
male or a female.
- Most young men grow some breast tissue at puberty which then
subsides and there is a fairly common condition called gynecomastia
where men grow breasts. This can be treated very successfully by
- Men can also get breast cancer which tends to get worse much
more quickly than in a woman, so any man past puberty who notices
any abnormality, or lumps in their breast tissue, should see a
- Men have nipples because we all were conceived gender neutral.
Somewhere during fetal development we develop into a female or a
male. You may notice male and female have all the same "bits" but
they differ in size and function. The clitoris for example is the
female counterpart to the penis........ovaries to gonads
........and nipples either sit on a pair of breasts or for the male
are just there. Also, early embryonic tissue that turns into the
uterus in females turns into the prostate gland in males.
An Inconvenient (maybe) Truth
Male humans can and do produce milk, i.e., they can lactate. Male
breasts contain all the structures needed to produce milk.
Further, it is not uncommon to observe lactation in both male and
female infants, due to the stimulation they receive from their