Several researchers have consistently observed that sex offenders are often socially isolated, lonely individuals who appear to have few intimate relationships. Sex offenders with numerous social contacts paradoxically described these relationships as superficial and lacking intimacy. The attachment model presented here provides a detailed account of how, in conjunction with other factors such as disinhibition, intimacy deficits may lead to a sex offense. The model suggests that different attachment styles are a result of different internal working models, which develop as a result of cumulative interpersonal experiences. These internal working models are associated with very different emotions and interpersonal beliefs, goals, and strategies. The model suggests that the assessment of each offender's attachment style and the associated interpersonal goals and strategies can better inform the process and delivery of treatment. The specific relationship style must be understood for specific relationship or social skills interventions to be as effective as possible. Table and 57 references