DEAR DOCTOR K: My doctor says my erectile dysfunction is most likely caused by vascular disease. Can you explain the connection?
DEAR READER: Erectile dysfunction (ED) -- trouble attaining and sustaining an erection -- is quite common in men over age 40. Why, you might ask, would nature (evolution) not preserve something so important to the continued existence of the human race? The average life expectancy throughout most of human history has been less than 50 years. Guys, we were not built to last!