Research concerning serial rapists' behavior during and following the commission of crimes showed that most rapes were premeditated. A threatening presence and verbal threats were used to maintain control over the victim, although minimal or no physical force was used in most instances. Victims physically, passively, or verbally resisted rapists in slightly over 50 percent of the offenses. The most common offender reaction to resistance was to verbally threaten the victim. Slightly over one-third of the offenders experienced a sexual dysfunction, and preferred sexual acts were vaginal rape and forced felatio. Low levels of pleasure were reported by rapists, and rapists tended not to be concerned with precautionary measures to protect their identities. Approximately one-third of the rapists consumed alcohol prior to their crimes, while slightly less reported using some other drug. The most common postoffense behavior reported by rapists involved feelings of remorse and guilt, following the case in the media, and increased alcohol and drug consumption. 15 references.