To the Editor.—
A letter from Dr. Robert Zufall (224:630, 1973) described laceration of the penis from a hand vacuum cleaner. The correspondent appears to regard these injuries as possibly accidental. We in urology tend to believe that they occur as a form of masturbation.I have had a patient with this injury who admits to this practice, and a number of urologists also have had similar cases as we discovered at a meeting of the New England Section of the American Urologists Association in October 1972. Many of the urologists present knew of this injury. I would paraphrase Zufall's letter, "So beware! It is more common than you think."