" Tolerance does explain an escalating pattern of sexual addiction. Tolerance occurs in either fantasy or behavior. For example, an addict using benign fantasies to become sexually aroused may progress to needing sadomasochistic fantasies. Or the addict may switch from fantasies to behavior when the addict reaches a level of tolerance to fantasies alone. "

― , Silently Seduced: When Parents Make Their Children Partners - Understanding Covert Incest