WebMD reports: "There comes a time in every man's life when he discovers the value of hiding the grosser parts of his nature. He starts reciting the sweet nothings you long to hear: "No, honey, I play golf for the exercise." "No, honey, I think you're a great driver." "No, honey, I wasn't looking at that coed washing the car in the rain.""
An interesting article about men's relationships with women, it includes some broad generalizations (so it doesn't apply to all men). So you have to take the information with 'a grain of salt'.