One of the leading causes of divorce and other marital problems is sexual incompatibility. One wonders how much this would be alleviated by open, positive and honest discussion of sex during childhood. One other thing that should be taught during childhood is that when a man asks a woman out on a date, part of his reason for doing so is that he is sexually attracted to her. The decision needs to be one of mutual agreement. After all, it's not much fun if only one of the people involved really wants to be doing it.
Nothing kills good sex like fear, apprehension, doubt, or selfishness.
Too many men don't appreciate that last point. Hey, guys, if you want her to think you're a great guy, learn to be more interested in her pleasure than in your own. Do your best to make it so and you'll never regret it.