They met in Paris. It was lust at first sight. It wasn't easy for him to feel this way. "Dear Gabrielle: Don't be afraid of how much I desire you," Le P.D.G. said to her in a note. He wrote when he feared that their love affair was doomed to end, and soon. But, of course, neither wanted it to die. On the contrary, both had plunged madly sexually into love. They ached for...