The symbolism of coitus involved in flagellation has been touched on by Eulenburg (Sexuale Neuropathie, p. 121), and is more fully developed by Dühren (Geschlechtsleben in England, bd. ii, pp. 366, et seq.).
A. Hoche, Neurologische Centralblatt, 1896, No. 2.
Op. cit., pp. 478, et seq.