I have never had this orgasm but I know that when they are touched the right way they help me get there.
This kind of female orgasm occurs during a peak of stimulation to the breasts. The nipples connect to nerves in the female genitals and many women feel a direct connection with their clitoris when their nipples are stimulated. Many women feel increased sexual excitement when their nipples are stimulated but not all of them can experience the breast orgasm. This depends very much on how sensitive their nipples are.