Aversion TherapyAversion therapy is used for the treatment of conditions which are pleasant but felt undesirable by the patient, e.g. alcohol dependence, transvestism, ego-dystonic homosexuality, other sexual detions. The underlying principle is the pairing of the pleasant stimulus (such as alcohol) with an unpleasant response (such as brief electrical stimulus), so that even in absence of unpleasant response (after the therapy is over), the pleasant stimulus becomes unpleasant by association. The unpleasant aversion can be produced by electric stimulus (low voltage), drugs (such as apomorphine and disulfiram) or even by fantasy (when it is called as cove sensitization). Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 215