Jill Di Donato on HuffingtonPost.com refers to a study which examines an unorthodox type of female orgasm, the “breast orgasm”. It has been found that the same areas of the brain are activated upon stimulation of the nipple and breast area as is with stimulation of the clitoris and vaginal areas of the body, thus causing an orgasm. It is not always consistent, however, as hormonal changes and menstrual cycles can play a part in the intensity of the sensations.
A worthy 5 minute read:
Jill Di Donato in the Huffington Post Discusses The Truth About Breast Orgasms