People are more accepting now of this variance that manifests itself in a very small percentage of people.
Is it right or wrong for someone to be that way? No.
I believe its wrong to act upon those impulses the same its wrong for an individuals to cheat on their spouses. Nevertheless, its up to them to choose regardless of my opinion on the matter. Some of the most dear people in my life are gay. They are dear to me because of who they are. Not because they are or are not gay.
But on the topic of whether its a psychological disorder... Who gets to decide whether it is or is not?