"The dramatic power of dopamine to interfere with free will and create sexual (and other) compulsions became clear when patients took drugs that imitate dopamine. For example, a Frenchman who took such a drug to control Parkinson’s symptoms recovered a large settlement from a pharmaceutical company after the medication temporarily gave him compulsive homosexual urges. (He was straight when not on the meds.)192 Another Parkinson’s patient suddenly found himself cross-dressing after seventy years of uneventful heterosexuality. When doctors decreased his dosage of the dopamine-like drug, the urge to put on his deceased wife’s clothing evaporated." From the book Cupid's Poison Arrow by Marnia Robinson
It could be over-dopamine eventually leads just about anyone to 'gay' behavior Hugh Heffner - mr 'playboy' had to eventually watch gay porn to 'get off' .. I have heard it's helpful to not think of this as 'gay' behavior or thoughts but over-stimulation - in someways you could be thankful it's not this or beastility or pedophilia - the brain searching for that next dopamine sex hit can go anywhere!