The F Box.

(This is assuming that they are referring to sex and not gender)

If I woke up as the opposite biological sex, I would be jumping with joy. For so long I have wanted my body to align with the way I feel, for others to see me as valid, to pass. But when the doctors saw my physical attributes, they checked this one little box that would decide how I should look, act, speak, display my emotions... be. And that was The F Box. Of course, for most people this isn't a problem. Most people wake up in the right body and get dressed in the right body and sleep in the right body and live in the right body. Most people never even think about their gender. Most people don't collapse into tears because the ones that are closest to them reject them.

But I guess I'm just not like most people.