Terrifying advice on masturbation from “What a Young Boy Ought to Know”, published in 1909:

‘No boy can toy with the exposed portions of his reproductive system without finally suffering very serious consequences. In the beginning it may seem to a boy a trifling matter, and yet from the very first his conscience will tell him that he is doing something that is very wrong. It is on this account that a boy who yields to such an evil temptation will seek a secluded, solitary place, and it is because of this fact that it is called the “solitary vice.” Because the entire being of the one who indulges in this practice is debased and polluted by his own personal act it is also called “self-pollution.” It is also called “Onanism,” because for a similar offence, nearly four thousand years ago, God punished Onan with death (Genesis xxxviii, 3-10). This sin is also known by another name, and it is called “masturbation,” a word which is made from two Latin words which mean “To pollute by the hand.”‘

Courtesy of Miss Abigail’s Time Warp Advice.