An irrational, or abnormal fixation or preoccupation; an obsession.
Sexual attraction to or arousal at something abnormally sexual or nonsexual, such as an object or a nonsexual part of the body.
Something which is believed to possess, contain, or cause spiritual or magical powers; an amulet or a talisman.
A complete obsession or absorption in a subject or hobby to a point where a person appears to completely tune out their surroundings and where the person repeatedly returns to said subject or material.