Probably because not knowing if you are a boy or a girl is the tip of the defective unit iceberg.
Knew a couple of these folks in the city from working at graphics depts in investment banks.
They work evening or overnight to stay in the shadows.
I did it because i HATE traffic and alarm clocks :)
They are heartbreaking to look at yet can be nasty as hell because of their mental illness and insecurities.
Still, they were more tolerable than most of the gay guys!