In a very crowded department store during the Christmas rush, a woman suddenly feels a stranger rubbing his genital area against her thigh. He continues until the crowd begins to break up, then moves away. The MOST likely diagnosis for this man is:

Frotteurism

Explanation:

Frotteurism is a form of paraphilia whereby an individual derives sexual pleasure from a non-consenting individual by rubbing their genital area against the non-consenting individual, most especially in public, which leads to sexual stimulation.

The man described in the question who rubs his genital area against a woman's thigh in public, without her consenting, can be most likely diagnosed with Frotteurism.

answer; (trauma);