Carnal Knowledge: A Navel Gazer's Dictionary of Anatomy, Etymology, and Trivia

This etymology helps me in teaching Yoga. "Wrist" is related to the word "wry" which means "twist" and one of the aspects of wrists is that they do twist.

Great fun and interesting information BUT the pictures on the cover (implying it's just a mundane sexual romp) stop me from giving it to my Grandkids and others who would love the content.