Monogamy is just the same. When two divorced people marry, four people get into bed. Ask your father. Men are creatures with two legs and eight hands. When a man steals your wife, there is no better revenge than to let him keep her.
Bachelors know more about women than married men do.
If they didn't, they'd be married too. There are a number of mechanical devices which increase sexual arousal, particularly in women. Chief among these is the Mercedes-Benz 380SL convertible. If you are ever in doubt as to whether to kiss a pretty girl, always give her the benefit of the doubt. I'll come up and make love to you at five o'clock.