Seeking to understand why some men choose to sexually offend against their immature family members is always a work in progress, as is work examining treatment efforts with these men. What we do know about these issues stems from a wide variety of theoretical perspectives. However, these perspectives have not always communicated effectively with one another, resulting in a somewhat fragmented knowledge base. We do, however, hold a more sophisticated understanding of intrafamilial offenders and their abuse than we did two decades ago, which is testament to the many research studies undertaken to understand intrafamilial abuse more fully.