I would agree with you that it's very bizarre. Makes you wonder what on earth is going on with this one.
It is bizarre. It is also statistically insignificant, like the gays. Homos only make up approximately 3% of the population. By definition, homosexuality is abnormal. Therefore, like trannyism, homosexuality should probably be treated as a mental disorder, with one caveat: if homosexuality turns out to be caused by something biological and outside of homo control, then it may just be properly classified as a medical condition.
We pretty well know that gay activity is not by choice. It is also probably not a genetic trait either, or else these genes would have long ago disappeared from the gene pool. The most likely cause, therefore, is genetic mutation. If this is the case, then there probably not going to be much that can be done to help them. As such, I think that it is perfectly appropriate to allow these abnormal mutations to rub their junk up against one another in a pathetic sham of a sexual custom. It's like getting all the Down's Syndrome retards together and letting them go on the bumper cars. They have a blast while all of us normal folks laugh at them trying to act normal.