“They were identical twin boys, Wyatt and Jonas Maines, adopted at birth in 1997 by middle-class, conservative parents. Healthy and happy, they were physically indistinguishable from each other, but even as infants their personalities seemed to diverge. By the age of 2, when the boys were just learning to speak, Wyatt asked his mother, “When do I get to be a girl?” From WaPo science writer Amy Ellis Nutt: Becoming Nicole.