A dour procession of stories about sexual misconduct by coaches toward their male charges has come to light in recent months. Jerry Sandusky, a former assistant football coach at Penn State, was sentenced in October to 30 to 60 years in prison on 45 counts of child molesting. Sugar Ray Leonard wrote in his autobiography last year that he was sexually molested by an Olympic boxing coach. The N.H.L. players Theo Fleury and Sheldon Kennedy were sexually abused as teenagers by their hockey coach Graham James.