Two Blondes With Hammers...
Carol and Donna, were doing some carpenter work on a
Habitat for Humanity house. Carol, who was nailing down
house siding, would reach into her nail pouch, pull out a
nail and either toss it over her shoulder or nail it in.
Donna, figuring this was worth looking into, asked, "Why
are you throwing those nails away?"
Carol explained, "When I pull a nail out of my pouch, about
half of them have the head on the wrong end and I throw
them away."
Donna got completely upset and yelled, "You moron! Those
nails aren't defective! They're for the other side of the
house!"