In writing the first edition of Scouting for Boys in 1908, Robert Baden-Powell planned to include a section on self-abuse. “You all know what it is to have at times a pleasant feeling in your private parts,” he wrote, “and there comes an inclination to work it up with your hand or otherwise. It is especially likely to happen when you see a dirty picture or hear dirty stories and jokes. Well, lots of fellows from not knowing any better, please themselves in this way until it often becomes a sort of habit with them which they cannot get out...