Not all pedophiles are child molesters. A person suffering from any paraphilia can legally engage in it simply by fantasizing and masturbating. A child molester is an individual who sexually molests children. A pedophile might have a sexual preference for children and fantasize about having sex with them, but if he does not act on that preference or those fantasies with a child, he is not a child molester. Whether or not a person acts on deviant sexual fantasies and urges may be influenced by other factors such as personality traits, the severity of psychosocial stressors, personal inhibitions, substance abuse, or opportunities. Inhibiting factors such as guilt, moral beliefs, or fear of discovery may limit or reduce the sexual activity with children. For many of them their problem is not only the nature or quality of the sex drive (attraction to children) but also the quantity (need for frequent and repeated sex with children).