That reminds me of a terrible old joke:

A young worker is putting on house siding when the foreman shows up, the foreman notices the young worker tossing every couple of nails out into the yard from his pouch. When the foreman asks “why are you throwing the nails out”, the young worker says “well they’re pointed the wrong direction I can’t hammer them into the wall”. To this the foreman replies “you idiot! Those are for the other side of the house!“