Penis Facts

A 4-foot walrus penis bone sold at auction in 2007 for $8,000.

An American urologist bought Napoleon's penis at auction for $2,900 in 1977.

The penis of a barnacle may reach up to eight to nine times its body size.

Male iguanas have two penises, called hemipenes, which they use one at a time during mating.

A pig's penis is shaped like a corkscrew.

In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’

Banana slugs can grow up to 10 inches long, and their penises—which emerge from their heads—can be equally impressive. After mating, one slug sometimes gnaws off its partner's penis in a bizarre process called apophallation.

Only 3% of bird species have penises.

A study had men report their own penis size, and the average was found to be 6.1-6.5 inches. A subsequent clinical study actually measured penises, and found the average size to be 5.1-5.7 inches.