In his editorial in the Annals of Internal Medicine, titled "Life begins at Forty," Thomas Fekete, professor of medicine at Temple, urged doctors to advise older patients to remember safe-sex precautions if they ask for erectile dysfunction drugs. "STD counseling should not stop at age 40," Fekete wrote in response to a study that found that men taking drugs for sexual potency showed almost triple the rate of sexually transmitted diseases compared with those not taking the medications. The results may have more to do with the nature of the men using the impotence drugs than with the medicines, the research report said.