What's a simple test that can tell if I'm healthy enough to have sex?

The mere desire and presence of an erection are, of course, supremely important. But because sex is a physical activity (or really should be), your heart and lungs have something to say about your ability to enjoy it, as well.

Want to know if you're at least healthy and fit enough to enjoy sex? Hit the stairs. If you cannot go up and down two flights of stairs without stopping, it's a sign that you have arterial damage that most likely will affect your sex life.