If one were to attempt a rough esimate on the frequency of each type, one might conjecture 25% of trannies belong to the OCD category, 10% to the homosexual category, and the remaining 65% exclusively to the paraphilia category.
Congenital homosexuals are an extremely rare error of nature, and OCD is a relatively uncommon illness affectig a very small portion of the population. But cluster B disorders account for at least a whopping tenth of the normal population. That is why they are so prevalent.