What describes a sadistic rapist's behavior during an assault?

A sadistic rapist often engages in a calculated and predatory approach to their assaults, which is characterized by the inclusion of verbal degradation and torture. This behavior reflects a desire to inflict pain and humiliation on the victim, highlighting a significant psychological component to their actions. Such assaults are not merely about sexual gratification; they are fueled by the perpetrator's need for power and control, which manifests through the suffering of the victim.

In contrast, behaviors described in the other options do not align with the typical profile of a sadistic rapist. The unpredictability associated with spontaneous and unplanned assaults does not fit, as sadistic rapists usually have a premeditated approach. Furthermore, while some rapists may end their assaults quickly, sadistic rapists often prolong the encounter to maximize the victim's torment. Lastly, the preference for known victims does not represent the modus operandi of sadistic rapists, who may target strangers to exert a greater sense of control and power.