So this blind goes-------------
So this blind man goes for a job at a timber yard, saying that he could identify every kind of wood by smell alone.
The yard man decides to test the blind man on his ability, so he tests him on all different types of wood and the blind man guess's right every time.
To catch the blind man out he gets the Secretary to lay naked in front of the blind man.
The blind man sniffs and asks for the wood to be turned over, so the secretary turns over, the blind man takes a really deep sniff in and seemed to be struggling until he said " you can't fool me that's an old s--thouse door off a tuna boat! "