Why is a penis called a penis? Most names of our genitals arise from other languages. And once you know the origins of the names for these body parts, you'll discover how sanitized modern language is when it comes to naming sex organs.

Earlier this afternoon, Saturday Morning Breakfast Cereal's Zach Weiner floated an interesting thought: "One day," he mused, "there will actually be a pill that grows your penis six inches."

Duck sex is far more interesting than it has any right to be, due to the twisted nature of the birds' genitals. Male and female ducks have corkscrew-shaped sex organs which spiral in different directions. Now we know why.