Sitting cross-legged on his hospital bed at Yanhee Hospital in Bangkok, South African Neil van der Merwe unwraps a layer of bandages to reveal a six-inch tube inserted into the inner part of his forearm. The contraption is being used to grow a penis, the final step in his transformation from woman to man. ”I wanted to do this a long time ago,” says the 35-year-old, who sports a thin goatee and has lived as a man for five years.