A woman answered the knock at her door and found a destitute man. He wanted to earn money by doing odd jobs, so she asked, “Can you paint?”
“Yes,” he said, “I’m a pretty good painter.”
“Well, here’s a gallon of green paint and a brush. Go behind the house and you’ll see a porch that needs repainting. Be very careful. When you are done, I’ll look it over and pay you what it’s worth.”
It wasn’t more than an hour before he knocked again. “All finished!” he reported with a smile.
“Did you do a good job?” she asked.
“Yes, but lady, there’s one thing I’d like to point out to you. That’s not a Porsche back there. That’s a Mercedes.”
Bonus Pun:
I did a theatrical performance about puns. It was a play on words.