This organ is made up of several parts, as follows: The lips, or labiae, as they are technically known, the clitoris, and the vaginal opening. The lips are a double row, two on either side, and are known as labiae major and labiae minor, that is, the thicker and thinner, or larger and smaller lips. They extend almost the entire length of the vulva, the outer lips folding over the inner ones when the thighs are together. The outer parts of the larger lips are covered with hair. In thickness and quality these labiae are much like the lips of the face of each individual, a large mouth and thick lips indicate a large vulva and thick labiae and vice-versa. The clitoris is a gland that is located forward, on the upper part of the vulva. It corresponds, almost exactly, in make-up and function, with the glans penis of the male organ. The vaginal opening is at the rear, or lower part of the vulva, and leads directly into the vagina proper. All these parts are composed of most keenly responsive nerves, and they are covered with a thin, delicate and exceedingly sensitive skin, almost exactly such as lines the cheeks and the mouth. Both the clitoris and the lips are filled with expandable blood vessels, and in a state of tumescence they are greatly enlarged by a flow of blood into the parts. The clitoris, in this condition, undergoes an enlargement, or "erection," which is exactly like that of the glans penis. So much as to the physiology of this part of the female sex organs, all of which should be well understood by every bride and bridegroom, though often it is not. Now, in its virgin state, the vulva has another part, not yet named, and this is the hymen, or "maiden-head" as it is commonly known. This is a membrane that grows across the forward, or upper part of the vaginal opening, and so _closes up_ nearly all that part of the vulva. This hymen is not always present, however, even in a state of undoubted virginity. Sometimes it is torn away in childhood by the little girl's fingers, as she "plays with herself." Sometimes it is ruptured by lifting, again it is broken away by the use of a large-sized female syringe. _For all these reasons, it is not right to conclude that a bride is not a virgin because the hymen is not present and in evidence at the first coition._