Vaginas with teeth â and other sexual myths - Sexploration - msnbc.com Your genitals are connected to your nose. Women are infertile males. Orgasm is necessary to make a baby. Masturbation leads to insanity. Menstrual blood is actually sperm gone bad. At one time or another, medical science believed all these statements. What is it about sex that allows the imagination of doctors and the scientifically-minded to run free? A walk down the memory lane of misbegotten sex theories reveals that such fanciful truths often grow from the fertile soil of bias and prejudice.