It is because of sexual hormones in the brain.
Men like boobs because they are a distinct part of female anatomy.
The female breasts exist to give milk to their babies. Since many men prefer women with big breasts, instead of small ones, many women try to increase the size of their breasts (within reason) to appeal to men. Most men do not like breasts that are too big.
Not every guy likes large breasts on females. Each male has their own likes with the female body. Some men may prefer women with small breasts while others may not like breasts at all.
Why do some men want to grow breasts like women
yes
YES.
Love it
The breasts of a female primate's body contain the mammary glands, which secrete milk used to feed infants. Both men and women develop breasts from the same embryological tissues. However, at puberty, female sex hormones, mainly estrogen, promote breast development which does not occur in men. As a result, women's' breasts become far more prominent than those of men.
Some men like it.
Not all men are obsessed with breasts, but those who are (and those who aren't) like the way breasts look. They also like to touch them. It is an excitement for them.
It is possible to enjoy the appearance of breasts in a completely platonic way. However, if you experience sexual attraction to the breasts -and hence the friend- then perhaps you are homosexual.
yes