Let’s say, just for the sake of argument, that I’m married. Which I’m not, but let’s say I am. Happily married. Healthy children, great career. No complaints or problems worth mentioning. And let’s say that I’m sitting at home one night with the kids put to bed and the wife at ladies’ auxiliary or whatever. I’m thumbing through a college yearbook, reminiscing as one will do, when I turn the page and there she is … smiling up at me. That girl I dated … who is not my wife.