According to this article in the Ottawa Citizen, tanning beds may be addictive.
Individuals who use UV tanning beds may meet the criteria for addiction, a study released Monday said. [Subjects] showed signs of tanning addiction, based on measures used to judge other forms of addiction, including substance abuse. "In addition to the desire for appearance enhancement, motivations for tanning include relaxation, improved mood, and socialization," researchers wrote in the Archives of Dermatology.
I especially like the rationale, being that motivations including “relaxation, improved mood, and socialization” constitute addictive behaviour. By that measure I am addicted to golf, motorcycling, sporting events, parties, and long lunches, so where do I go to apply for disability benefits?