Final answer:
The most common motive for necrophilia is the possession of a partner who does not reject, providing control without interpersonal complexity.
Step-by-step explanation:
The most common motive for necrophilia appears to be the possession of a partner who does not reject. Necrophilia is a psychological condition characterized by sexual attraction to corpses. It's considered a paraphilic disorder, in which individuals have sexual fantasies, urges, or behaviors involving non-living objects. This condition can be driven by various factors, but one of the dominant motives is the desire for an unresisting and non-rejecting partner, which provides control over the sexual encounter without the complexity of interpersonal relationships. In contrast, other motives such as the fear of adult women, desire to have sex with an inanimate object, or the fear of contracting sex-related infections, can also influence this behavior but are generally not as commonly reported.