Rub-A-Dub-Dub

"When you see flies sitting on the windowsill rubbing their legs together, they are cleaning themselves. Flies rely on their compound eyes, antennae and the bristles on their bodies and legs to sense the world around them. They have to keep these sense organs clean so they can fly with precision to find food and mates and avoid predators."

How clean they are -
Our friends the flies!
Some biased folks
Think otherwise.

But just observe
The scrubbing they do
Before they alight
On a pile of poo!