Lens to lens

What a horrible grey Friday it is so here's joke with a slightly dirty squirrel theme..........

Deep in the woods sat a bear and a squirrel at the communal latrine. "Hmmm" says the bear to the squirrel, "Do you find that poo tends to stick to your fur?"
"Yes it does" replies the squirrel.
"Great!" says the bear, and wipes his bum with the squirrel.