Very Insensitive humor...

A couple good ol' boys are driving along a quiet country road. Cresting a hill, they can see a sheep alongside the road with its head stuck in the fence. "Hey Barney, check it out" says the driver. He pulls over, stops the truck and gets out. He walks over to the sheep, services it, and returns to the truck a few minutes later.

"Okay Barney, it's your turn."

Barney gets out of the truck, walks over and sticks his head in the fence.