When you are old and grey and full of sleep,
And nodding by the fire, take down this book,
And slowly read, and dream of the soft look
Your eyes had once, and of their shadows deep;

How many loved your moments of glad grace,
And loved your beauty with love false or true,
But one man loved the pilgrim soul in you,
And loved the sorrows of your changing face;

And bending down beside the glowing bars,
Murmur, a little sadly, how Love fled
And paced upon the mountains overhead
And hid his face amid a crowd of stars.

-- William Butler Yeats

The creative force underlies the attractions and comradeships between boys and girls, as well as courtship, love, marriage and family life.

It makes manliness, womanliness, motherhood and fatherhood.

To both boys and girls, sex gives a new joy in living, a desire for a career, a longing to do great things for the race.

It inspires the arts, the sciences, and the culture of civilization.

-- The American Social Hygiene Association, 1922, quoted from Intimate matters: A History of Sexuality in America, by John D. Emilio and Estelle B. Freedman