Which behavior is typically associated with frotteurism?

Frotteurism is characterized by the act of gaining sexual gratification from touching or rubbing against a non-consenting person, usually in a crowded place. This behavior often involves someone pressing their body against another person, particularly in situations where they can do so without being easily detected, such as on public transport or in busy public spaces. The individual engaging in frotteuristic behavior derives pleasure from this non-consensual contact, often accompanied by fantasies of a sexual nature regarding the person they are touching.

This choice accurately reflects the core aspects of frotteurism as defined in the DSM-5, making it the correct answer in this context. Understanding this behavior is crucial for recognizing the boundaries of consent in interactions and the implications it has for both the individual exhibiting such behavior and the victims.