The functional hermaphrodite enables us, too, to understand the phenomena of masochism and sadism, to a certain extent, on the chemical side. The masculine personality, the combination of masculine, e.g., adrenal cortex and gonad internal secretion predominance, is built for aggression. The feminine personality, the union of feminine, e.g. thyroid and ovarian superiority, is constructed for submission. Reverse the possibilities, or confuse them, as occurs in the functional hermaphrodite, and the attitudes become reversed or perverted. So a masculinoid personality in woman will make for sadism, a feminoid personality in a man for masochism. Variants and refinements of these perversions will often be found in the functional hermaphrodite who must satisfy two doubly flowing streams of visceral pressure within himself. Persistence of the thymus or pineal gland tends to a prolongation of the infantile and child types, that will be taken advantage of. CHAPTER VII THE RHYTHMS OF SEX If one permits a drop of ink to fall into a glass of water, amazing figures and shapes, bizarre and chameleon, are born as the blue swirls and whirls through the resisting medium. Unseen forces and currents, tides and pressures, set up a seething and flowing, pulling and twisting of the drop of ink until it becomes a strange wraith created out of the molecules. A temporary individuality lives in the water. So likewise the forces of sex, essentially the forces of the internal secretions, mould and sculpt and mould again the woman out of the flesh and blood. Adolescence--puberty--menstruation: the maid,--pregnancy--labor--lactation: the matron, thirty years of ups and downs of these processes around the idea of love or suppressed love, against an aesthetic background of some sort--and finally the loss of the stress and strain of sex, the menopause. All the landmarks of the life of woman, in their entirety, are erected and dominated by the tides and currents, the phases of concentration and dilution, of the different internal secretions in the endocrine mixture which is the blood.