Many men's sexual performance suffers as they become older due to stress, reduced desire, and other factors. As you become older, naturally your libido will decrease. A lack of sex desire and sexual insecurity are more common in men over the age of 40. Even if you're 60 or older, today's medical professionals are still stymied in their quest to discover a cure. Prescription medications like Viagra and Cialis used to be the sole choice for getting your mojo back.