Passage: The male or female breast, nipple and areola develop similarly in the fetus and during infancy. At puberty, the male's breasts remain rudimentary but the female's develop further, mainly due to the presence of estrogen and progesterone, and become much more sensitive than the male ones. Smaller female breasts, however, are more sensitive than larger ones.

Question: Why do female breasts develop more than males' breasts?
the presence of estrogen and progesterone