Child Molestation - Child molestation is an umbrella that encompasses all sexual activity between children and adults, including incest and extrafamilial sexual contact. "Child molesters" as a group are extremely heterogeneous and require informed subclassification to improve the accuracy and reliability of decision- making within the criminal justice system.

Pedophilia - From its Greek roots, pedophilia implies love of a child ("paidos" + "philia"). In practice, pedophiles are typically adult males with exclusive sexual preferences for prepubescent boys and/or girls. Adult women can be diagnosed as pedophiles as well as some postpubertal adolescents. Pedophilia is not synonomous with child molestation ( pedophilia being a subcategory of child molestation). There are clear and specific criteria for diagnosing pedophilia in the DSM.

Incest - From the Latin, "incestus" or unchaste, refers to sexual activity between two people of close kinship, typically by reason of marriage or adoption. As a group incest offenders are extremely heterogenous. Consequently, in an attempt to increase precision, the term incest is often reserved for cases of exclusive endogamous "within the family" sexual contact.

Rape - From the Latin "rapere," to seize, refers to forced, coerced, or manipulated sexual contact between an adult male and an adult female. . "Rapists" as a group are extremely heterogeneous and require informed subclassification to improve the accuracy and reliability of decision- making within the criminal justice system. Rape is not regarded as a paraphilia.

Frottage - The French word frottage, or "frotteurism," refers to deriving sexual gratification from contact, especially in the genital area, with strangers. Typically, such contact occurs in crowded situations such as on buses where the individual rubs up against a stranger.

Sadism- Named after the French author and sadist, the Marquis de Sade (1740-1814), sadism refers to deriving sexual pleasure from the infliction of pain, fear, and/or humiliation in the context of sexual activity. Muted sadism reflects underlying sadistic fantasy, often played out symbolically, with a relative absence of aggression. Muted sadists appear to be higher in social competence than overt sadists, with increased social skills mollifying the aggression.

Zoophilia (Bestiality) - from the Greek, zoon for animal, zoophilia refers to cross-species sexual activity, typically deriving sexual gratification with cats, dogs and some farm animals.