Well, they don’t “trick” themselves. Sometimes people are born with the other gender’s brain. It happens. They can’t help it. It’s like a person born with aspergers or other mental illnesses. It’s a mistake in the development process. Certain atoms didn’t align as nature designed us and it results in a mutation of some cells. The result can be things like mental retardation or physical deformities. These people are not able to control it. It’s unfair to accuse them of trickery.