adistic heredity.

Sadistic cruelty is often of the gross, brutal, repulsive kind, but
sometimes the sadist inflicts on his "beloved" object refined tortures
of which only a cunning "demon" is capable. The sufferings which the
wives of some sadists have to undergo are known only to themselves and
to a few--very few--physicians.

=Masochism=

Masochism is a sexual perversion in which the person, man or woman,
_likes_ to suffer pain, beatings, insults and other cruelties at the
hands of the beloved object. It is a dysgenic factor but much less
important than sadism.

=Sexual Impotence=

Sexual impotence is not hereditary, but impotence in the male either
so complete that he cannot perform the act or consisting only in
premature ejaculations (relative impotence or sexual insufficiency)
should constitute a bar to marriage. This impotence may not interfere
with impregnation; the wife may have children and the children will
not be in any way defective, but the wife herself, unless she is
completely frigid, will suffer the tortures of hell, and may quickly
become a sexual neurasthenic, a nervous wreck, or she may even develop
a psychosis. Any man suffering with impotence should have himself
treated before marriage until he is cured; if his impotence is
incurable, then for his own sake and for the sake of the girl or woman
he is supposed to love he should give up the idea of marriage. The
only permissible exception is in cases in which the prospective wife
knows the nature of her prospective husband's trouble, and claims that
she does not care for gross sexual relations and therefore does not
mind the impotence. In case the wife is absolutely _frigid_, the
marriage may turn out satisfactory. But I would always have my
misgivings, and should the wife's apparently absent but in reality
only dormant libido suddenly awaken there would be trouble for both
husband and wife. It is therefore necessary to emphasize: in all cases
of impotence--caution!

=Frigidity=

Frigidity, as we have explained in a previous chapter, is a term
applied to lack of sexual desire or sexual enjoyment in women. Of
course many women before marriage are themselves ignorant of their
sexual condition. Having learned to restrain their impulses, to
repress any sexual stir, they themselves are often unable to say
whether they have a strong or weak libido, or any at all. And whether
or no a given woman would derive any pleasure from the sexual act c