Almost always the existence of temporary or lasting neurasthenia may be
proved. As a rule, this is constitutional, having its root in congenital
conditions. It is awakened and maintained by masturbation or enforced
abstinence.
In male individuals, owing to these practices or to congenital
disposition, there is finally neurasthenia sexualis, which manifests
itself essentially in irritable weakness of the ejaculation centre. Thus
it is explained that, in most of the cases, simply embracing and
kissing, or even only the sight of the loved person, induce the act of
ejaculation. Frequently this is accompanied by an abnormally powerful
feeling of lustful pleasure, which may be so intense as to suggest a
feeling of magnetic currents passing through the body.