So if who you think of as your little girl says "I want to have a penis," it's ineffective and dangerous to assume, "She's just a tomboy, and will grow up to be a happy, perhaps mannish woman, perhaps even a lesbian woman, but that would be okay because I'm a liberal who's supposed to tolerate that." Bodily identity rarely if ever changes over time, and it can't be cured or changed with therapy any more than sexual orientation can be -- perhaps even less easily than sexual orientation can be changed. If you're transsexual, and your feelings of bodily incongruence bother and upset you, it's unlikely that that feeling will go away by itself, and likely that a combination of hormones, surgery, and publicly expressing your desire to be acknowledged as a member of your preferred gender (not necessarily all of the above) will help. People don't grow out of this one; people who know when their age is in single digits especially don't grow out of this one. There is no evidence to the contrary.
