Are sexual desires limited to a particular age?

The short answer is no. The focus of sexual desire will change from attracting a mate to self-discovery to comfort and consolation to self-deprecation depending on what is happening in your life, your psychological make-up and/or your age. The goal of sexual desire will change from producing off-spring to exploring your own body, etc. However, having sexual desire is normal, human and worth cherishing. 

Sexual desires can be a source of pleasure at any age. In our teen years, most of us learn that we are supposed to make ourselves beautiful and sexy to become objects of (boys') desire—but not to enjoy our bodies, not to have desires ourselves. We may come to fear that if we have desires, they will automatically lead us to risky sexual behaviors that will, in turn, lead us into danger—unwanted pregnancy, forced sex, and sexually transmitted infections. Once we become aware of our desires, we can choose whether and how to act on them. Some people masturbate, fantasize, write erotic stories, dance, or express them with a partner.