The third was removed because it doesn't lead to "any behaviors" other than the behaviours consenting sex between adults generally leads to. There is no psychological defect and no social cost. The social cost was in the criminalization of homosexuality and its associated discrimination. This is clearly not the case with kleptomania, which is a compulsive disorder that has a moral and social cost, and alcoholism which is a disease that kills people, both the victim and other people the victim may come in contact with when under the influence.