Women make 80 percent of all health care decisions in their households. So that means if there's a man in your life, he may need some persuasion from you in order to take better care of his health, especially if he's under 40. That's because most younger men don't go to the doctor unless there's trouble with their equipment. Problems with the penis, testicles or prostate are something to encourage him to see a urologist about—they're like gynecologists for men. Often a man's parts can alert a doctor to other health issues that need to be addressed, including cardiovascular disease, diabetes or high cholesterol. Take this quiz to test your knowledge about men's health.