A special variety of psychic impotence is that in which erection takes place, but the idea of ejaculation predominates so much that it paralyzes the voluptuous sensations, and causes ejaculation to occur without pleasure, or even erection to cease. Impotence may occur at the first coitus, or may come on gradually. It is often produced suddenly at the time of marriage in persons who have hitherto been very capable, even in Don Juans. Men may have normal erections and pollutions, but these may be stopped by counter-suggestions at each attempt at coitus. Habitual masturbation may in some cases contribute to produce impotence, but we must not generalize from such cases, nor construct a dogma from them, for continence may also be a cause of impotence. All these details, which are combined in all kinds of ways with other sexual troubles, but which are also produced alone in men who are otherwise normal, throw much light on the relation of the momentary mental state of man to his sexual appetite and the accomplishment of coitus. I do not know under what heading the following case should be placed: A young man of steady habits, and normal sexual appetite, had always abstained from sexual connection and masturbation. He only had emissions during sleep. The latter were accompanied by erotic dreams, but never produced an orgasm, while disagreeable sensations occurred on waking. He married for love a woman in whom the hymen was resistant, and vaginismus occurred on each attempt at coitus. These attempts failed constantly in spite of the most intense love and the most ardent desire for children on both sides. The husband's erections were incomplete, and he never had an ejaculation except when asleep. By the aid of hypnotism I succeeded in strengthening his erections, and an operation on the hymen cured his wife's vaginismus. The first attempts at coitus were not immediately successful, but suggestion acted after a time; finally the attempts were crowned with success, and followed by a first and second pregnancy. The children were healthy. In this case, the impotence, which had lasted about eighteen months, did not affect the mutual love and respect of the couple, because the husband's affection combined with his sexual appetite had sufficed for the happiness of a woman who was on the whole normal. This case is very instructive in several ways, for it gives a good example of the nature of the sexual instinct in woman; it also shows how the auto-suggestion of emissions occurring only during sleep may hinder copulation in the waking state. But such phenomena are extremely rare. It is hardly necessary to say that there is no true impotence in woman; but the same mental paralysis may occur as in man, preventing orgasm and often causing disgust. SEXUAL PARADOXY