How that a baby comes from a man and a woman. I want that kept clean.
It starts clean. Why do we corrupt it? You who disparage it corrupt
it. You ascetics anywhere. You libidinous roues anywhere. You corrupt
it. By your excesses. You who never say yes. You who never say no. You
corrupt it.

You parents. You professors. You prudes. This is addressed to you.
What have you got to say about it? You have tremblingly closed the
question. I would coolly open it. You have rebuked God by silence. I
would praise God by speech.




II

THE ARGUMENT AND THE INFORMATION


No apology is offered for what is said in the following pages, but
a brief explanation is virtually necessary to make clear, from the
outset, the reasons why it has been written.

It is one of the chief characteristics of the human race that
the knowledge acquired by one generation can be passed on to the
generations that follow; and that, in this way, progress in the
betterment of life's results and the adaptation of means to ends can
make a steady and reliable advance.