Partialism refers to exclusive sexual attraction to a specific body part.

Partialism

A sexual interest focused predominantly on one specific part of the body, other than the genitals, for sexual arousal.

Sexual Attraction

The feeling of being drawn toward someone in a physical, emotional, or romantic way, often based on sexual desire or the wish for sexual contact.

Specific Body Part

Refers to a distinct region or part of the human body identified for particular interest or discussion.