Sex report is hard on men

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BOSTON (Reuter) - A study by US doctors estimates that up to 15 per cent of all cases of impotence are caused by injury during intercourse. The study, which appears in the Journal of Urology, is the first to demonstrate how pressure or abnormal bending of an erection during intercourse or masturbation can result in chronic impotence.

'Men think their erections are made of concrete,' Irwin Goldstein, leader of the team of researchers, said. 'Patients are often quite surprised when they are told it is possible to permanently injure their erections during intercourse.'