Natural Law: Or Don’t Put a Rubber on Your Willy is a lecture (and later a published transcript) by Robert Anton Wilson, originally recorded around 1985. It’s a mix of satire, social commentary, and philosophy, delivered in Wilson’s typical style — meaning it’s funny, irreverent, and sharply intelligent.

In it, Wilson critiques the concept of “natural law,” especially as used by religious and political authorities to control human behavior — like sexuality, drug use, and free thought. He pokes fun at how “natural law” is often invoked to justify repression rather than to promote actual natural human freedom. The title itself (“Don’t Put a Rubber on Your Willy”) is a tongue-in-cheek jab at religious prohibitions on contraception, particularly the Catholic Church’s stance.

While the book may not be as well-known or mainstream as some of his other works, it still carries Wilson’s trademark style of blending deep thought with wit and irreverence, making it a unique exploration of personal freedom and the human experience.