Why Limit Trans to Sex?

"The 'transsexual male' [that is, transgender woman--SR] is indistinguishable from other males, save by his desire to be a woman.... If such a desire qualifies as a disease, transforming the desiring agent into a 'transsexual,' then the old person who wants to be young is a 'transchronological,' the poor person who wants to be rich is a 'transeconomical,' and so on and on." 

--Thomas Szasz, writing in 1979