Kerry, my wife, has taken one of my friends as her lover. She's not been doing it behind my back; she's doing it with my knowledge and blessing. Her having a lover is something we'd both wanted to happen for quite some time. Well, to be honest, I'd been fantasizing about it for years. The explanation of how, and why, we began to discuss it begins a few years before their affair started. But before I get into that, I shoul...