As a rule, remarks _Erb_, it is believed that the sexual impulse is less intense in women than in men. This is true enough, he writes, as regards youthful and virgin individuals, who have not yet come into intimate contact with men, and in whom sexual desire and sensibility have not yet been directly excited; later, however, when sexual intercourse has been begun, a change usually takes place, and the sexual needs become active in women also, and demand satisfaction. It is well known that not a few women experience powerful and uncontrolled sensual inclinations, just like those of men. On the other hand, we must insist that quite a large number of women possess the so-called _naturae frigidae_, and have no sensual inclination to sexual intercourse, to which they are either indifferent, or in some cases strongly averse, even regarding it with horror. This lack of the sexual sense in women, is especially common in hysterical subjects, and _Erb_ reports that he has encountered quite a large number of cases of this character. Whether in quite healthy women with normal sexual impulse, complete abstinence from sexual intercourse, too often compulsory but sometimes voluntarily undertaken, is harmful in its consequences—this, says _Erb_, is a question very difficult to answer. Many such unfortunate women have assured him that they suffered severely in consequence of their enforced continence; the majority of these became neurasthenic or hysterical. The complication of purely physical influences with mental influences, increases the difficulty of the problem. Neurologists have observed women on whom continence was forced either during marriage or after its dissolution, who thereupon fell into a state of severe nervous exhaustion or nervous excitement, or suffered from threatening or even actually developed psychoses. That sexual abstinence is “absolutely harmless,” as moralists and many physicians would so gladly believe, appears to _Erb_ a quite unwarrantable assumption.