Four years ago, Emmetsburg, Iowa, insurance agent Jim Wirtz, now 65, had
triple bypass surgery. Just 10 days later, he was back at the office. Three
weeks after that, he received a clean bill of health from his doctors, who said
he could do any physical activity -- except shovel heavy snow.
Wirtz took their advice, and he and his wife resumed having intercourse.
"Stay in the game, whether it's sex or work," he says. "My own
philosophy is, you just better live."
Wirtz is doing what doctors...