Is Same Sex Attraction Disorder [SSAD] real or just something for people to explain away their homosexuality?

Is Same Sex Attraction Disorder a real condition or just a belief of people who do not want to admit they are Gay? It is it a real and treatable condition what does that say of those who are Gay? If genes are not the cause of Same Sex Attraction Disorder in some people, what is? Was Richard A. Cohen the 1st to come up with it? If he did was it to try to explain away his homosexuality or deny he was Gay?