Hammer, who has had much opportunity of studying the psychology of prostitutes, remarks that he has seen no reason to suspect sexual coldness (Monatsschrift für Harnkrankheiten und Sexuelle Hygiene, 1906, Heft 2, p. 85), although, as he has elsewhere stated, he is of opinion that indolence, rather than excess of sensuality, is the chief cause of prostitution.
See "The Sexual Impulse in Women," in the third volume of these Studies.
Tait stated that in Edinburgh many married women living with their husbands in comfortable circumstances, and having children, were found to be acting as prostitutes, that is, in the regular habit of making assignations with strangers (W. Tait, Magdalenism in Edinburgh, 1842, p. 16).