What is the cause of big nipples?

Hello, this is the information I found in Baidu. What's wrong with female nipples?

The main reason why female nipples are large is genetic factors or nipples are sensitive to stimulation. Nipples can be primary, more common in unmarried women; It may also be caused by children sucking and pulling.

In addition, the nipple size of women is closely related to heredity and hormone secretion in the body, but not directly related to sexual experience. In life, some women's areola will become larger because of the high level of estrogen and progesterone secretion in the body, which is indirectly related to sucking. If you don't suck too much, it won't have much impact. It's natural to have big nipples.