…Photo: Art Streiber; Styling by Nikki Pennie/Solo Artists; Hair by Daniel Erdman for Redken/Solo Artists; Makeup by Jenn Streicher for Dior Beaute/Solo Artists; Prop Styling by Jamie Dean/The Magnet Agency) The sexiest part of an affair is where it begins. You know what the middle looks like, hotel-sheeted and ultimately routine, and you know the way it will end, but where and how it began is always a little surprising. Historically, powerful men with slavering…