When adolescent boys and girls are able to rush from one pleasure to another, from one emotional entanglement to another, without a thought of the consequences involved or of other persons concerned, except what contribution they can make to selfish enjoyment, when all this is done in the name of modern self-expression, then a state of moral danger can be said to exist. The Buddha suggested a philosophical way of controlling the animal passions in man. He affirmed that if we will think often of the inevitability of our own death, if we will remember that the upshot of all our activities is the funeral-pyre, the burial grave, we will begin to realize how pitiful, how ultimately worthless, and how immediately transient are all our passions. How will the animal passions appeal to the man lying on his deathbed? The thought of death even to those who are still very much alive will thus diminish the strength of lust, greed, hate, and anger.
-- Notebooks Category 5: The Body > Chapter 7 : Sex > # 88