"[T]hough the fact seems little known, the clitoris of one woman may be stimulated nearly as effectively by the vulva of another woman, as can the penis of a male with the vagina of the female. The female emotion resulting from stimulation of the clitoris by another woman (as apparent in the behavior of women prisoners) seems fully as extensive as the male emotion resulting from stimulation of the penis. In this type of physical relationship, both women most frequently experience simultaneous stimulation of the clitoris with appropriate emotional states following. Neither woman, of course, receives stimulation of the mouth of the vagina."