David Reimer

David Reimer was born a boy,brought up as a girl.

In this short clip, David Reimer says, referring to nature being stronger than nurture to define gender identity:

"I'm living proof, and if you are not going to take my word as gospel, because I have lived through it, who else are you going to listen to? Who else is there? I've lived through it. Is it going to take someone killing themselves, shooting themselves in the head for people to listen?"

David Reimer shot himself not too long afterwards.

John Colapinto's book, "As nature made him" also states that Reimer decided to come public when he learned that potentially thousands of children had been sexually reassigned over the alleged success of his own (failed) sexual reassignment. Until then, David believed that his case was unique.