Sexual addictions are extreme and frequent thoughts about sex/sexual urges that can make someone feel like they are losing control of their desires. Sexual addiction can range from excessive masturbation, pornography, phone/computer chatting to more severe behavior such as voyeurism, molestation, or rape.
People suffering with sexual addictions will continue in their actions with little respect for the health and safety of themselves or their partners.
A great resource for those struggling with sexual addiction is Fight the New Drug. It is an organization that exists to provide individuals the opportunity to make an informed decision regarding pornography by raising awareness on its harmful effects using only science, facts, and personal accounts.