In this paper we consider two sets of so-called “cognitive distortions”: those that have been shown to be unrelated to reoffending (i.e., noncriminogenic factors) and those that have been demonstrated to predict recidivism (i.e., criminogenic factors). While most sexual offender programs target the modification of all these distortions, we argue that treatment should only address the criminogenic attitudes and beliefs. Dissimulation characterizes human responses to personal bad behaviour where the person attempts to present themselves as not having behaved in a harmful way and sexual offenders are no exception. As it turns out excuse-making is healthful and results in a reduction in reoffending. It may, therefore, not only be counter to accepted principles of offender treatment to attempt to change noncriminogenic distortions, it may result in increased rates of reoffending. However, those distortions that are criminogenic must be targeted in treatment if we are to reduce reoffending.