"I feel kind of sad when I realize how long it's been since we had sex," said Shelley. "But honestly, after chasing after the kids all day, the sexiest thing I can think of is a nap." Shelley's the third woman this week to tell me about her longing for a nap! Sometimes it looks to me like there are hundreds of married women who would be just as happy to skip out on sex indefinitely. Or would they? The Rutgers University National Marriage Project did a study that found that wives who are happy with their sexual relationships have a 39% greater chance of being happily married. For men the difference is 38%. Not much of a difference and probably not what you'd expect.