Every man has been brought up with the idea that decent women don't pop in and out of bed; he has always been told by his mother that "nice girls don't." He finds, of course, when he gets older that this may be untrue-but only in a certain section of society.
The reason why Englishmen are the best husbands in the world is because they want to be faithful. A Frenchman or an Italian will wake up in the morning and wonder what girl he will meet. An Englishman wakes up and wonders what the cricket score is.