The latter has to avoid the slightest thing which might arouse
jealousy, but all in vain; reserve and even prudery are regarded by
the jealous husband as hypocrisy. The unfortunate man watches his
wife, night and day, like a watchdog: he threatens and insults her
with no reason, and calumniates her in all ways, even in the presence
of a third party. He even lays elaborate traps for her. Cases of this
kind are legion.

(5). It is necessary to say that the _sexual paraesthesias_, of which
we have spoken, sadism, masochism, fetichism, inversion, etc., often
occur in the insane.

(6). The most atrocious sexual crimes are very often the work of
idiots or imbeciles, but especially _moral idiots_, _i.e._, persons
whose idiocy is limited to the moral sense, who are also called simply
_amoral_. This is due to hereditary taint, an innate absence of all
sentiments of sympathy, pity and duty. Rape, violation of children,
sexual assassination, etc., are usually due to the concomitant action
of moral idiocy and violent or perverted sexual passions.

(7). _Hypochondria_ also causes singular results in the sexual sphere.
We have already dealt with the masturbation of certain hypochondriacs,
which is often wholly or partly imaginary. Others believe they have
committed terrible sexual excesses, when nothing of the kind has
occurred. I have seen a hypochondriac married and strongly built, who
believed his health was ruined because he cohabited with his wife once
every two or three months. Other hypochondriacs become impotent simply
because they think they are. Others again imagine they are affected
with venereal disease, which they have never contracted.

(8). Hysterical men and women have a very peculiar sexuality. Hysteria
depends on auto-suggestion or on an exalted and morbid dissociability
of psychic activity. A single idea is sufficient in a hysterical
subject, to produce the realization of what it represents. The
passionate imagination may lead to opinions and actions which are
absolutely contradictory. Love and hatred often alternate by
transformation. According to the influences to which she is exposed,
the same hysterical woman may become a good or evil genius.

In the sexual domain the same extremes are produced in a very striking
manner. Inflamed by love, a hysterical woman may exhibit phenomenal
eroticism and the most violent sexual excesses, while indifference,
disgust, or simply distraction by other ideas will render he