The practice of public self-flagellation in church during Lent existed in Spain and Portugal up to the early years of the nineteenth century.  Descriptions of it will often be met with in old volumes of travel.  Thus, I find a traveler through Spain in 1786 describing how, at Barcelona, he was present when, in Lent, at a Miserere in the Convent Church of San Felipe Neri on Friday evening the doors were shut, the lights put out, and in perfect darkness all bared their backs and applied the discipline, singing while they scourged themselves, ever louder and harsher and with ever greater vehemence until in twenty minutes’ time the whole ended in a deep groan.  It is mentioned that at Malaga, after such a scene, the whole church was in the morning sprinkled with blood. (Joseph Townsend, A Journey through Spain in 1786, vol. i, p. 122; vol. iii, p. 15.)

Even to our own day religious self-flagellation is practised by Spaniards in the Azores, in the darkened churches during Lent, and the walls are often spotted and smeared with blood at this time. (O.H.  Howarth, “The Survival of Corporal Punishment,” Journal Anthropological Institute, Feb., 1889.) In remote districts of Spain (as near Haro in Rioja) there are also brotherhoods who will flagellate themselves on Good Friday, but not within the church. (Dario de Regoyos, Espana Negra, 1899, p. 72.)

When we glance over the history of flagellation and realize that, though whipping as a punishment has been very widespread and common, there have been periods and lands showing no clear knowledge of any sexual association of whipping, it becomes clear that whipping is not necessarily an algolagnic manifestation.  It seems evident that there must be special circumstances, and perhaps a congenital predisposition, to bring out definitely the relationship of flagellation to the sexual impulse.  Thus, Loewenfeld considers that only about 1 per cent, of people can be sexually excited by flagellation of the buttocks,[112] and Naecke also is decidedly of opinion that there can be no sexual pleasure in flagellation without predisposition, which is rare.[113] On these grounds many are of opinion that physical chastisement, provided it is moderate, seldom applied, and only to children who are quite healthy and vigorous, need not be absolutely prohibited.[114] But, however rare and abnormal a sexual response to actual flagellation may be in adults, we shall see that the general sexual association of whipping in the minds of children, and frequently of their elders, is by; no means rare and scarcely abnormal.

What is the cause of the connection between sexual emotion and whipping?  A very simple physical cause has been believed by some to account fully for the phenomena.  It is known that strong stimulation of the gluteal region may, especially under predisposing conditions, produce or heighten sexual excitement, by virtue of the fact that both regions are supplied by branches of the same nerve.