David Sper writes in his book Designed for Desire, “The root of all sexual perversions and immorality begins with the desire to relieve one’s pain with pleasure.” It’s natural for us to be seeking pleasure and avoiding pain. So when pain doesn’t go away when we try to satisfy our cravings, we seek bigger and bigger pleasures to satisfy them, to override and erase our pain.
Every sin is the result of an appetite going astray and seeking fulfillment in something other than what God intended. First, we experience that something is missing inside. Then, we begin seeking ways to compensate for the void. This becomes especially destructive when we try filling an emotional or spiritual void with something physical.