The Penis Book, written by a woman for men who are willing to spend, at Amazon, $111 to learn about something that takes about two seconds to understand. It contains insights like this:
There are no muscles in the penis.
Whoa, dude! For real?
The Penis Book claims to be 96 pages long, but it looks more like 40 to me.
And I really have no idea about the price. Maybe it's some kind of campy collector's item or something.