I was working on a new construction house one time, and the guy I was working with was always arguing with the roofers.
One day he says “come here, I want to show you something” so we go outside…
Looking up at the roof he says “see the roofers up there working with a hammer in one hand and roofing nails in there mouth”
I said “yeah”
Well, he said…”I pissed in their box of roofing nails last night!” LOL
To this day, every time I see roofers with nails in there mouth I chuckle.