Here's mine: Civil War General Joseph Hooker brought prostitutes along for his soldiers to keep them sexually satisfied. His legacy is so famous that his name is now synonymous with the world's oldest profession.
Most Helpful Girl
You can tell the difference between a male and female lightning bug/firefly by their blinks. If the blinks are quick and short they're male and if the light is slower to fade they're female.2
Most Helpful Guy
Cats have barbed penises. That is all :P1