Two brothers have had trouble getting work. They finally wind up at the docks.

A ships captain agrees to take them on with the proviso that they stay out of
sight of the rest of the crew as much as is possible.
You see one has only one eye, a giant cyclopian eye smack in the middle of his
forehead. So the the captain sends him up to the crow's nest having figured that
this was probably the best place for him.
The second chap was equally unfortunate. He had only one ear, a giant elephant
like ear on his right side. He was sent to swab the decks.

A couple of days out to sea and the bloke in the crow's nest yells out
"Chinese junk off the starboard bow!" The captain and other officers race up on deck
and begin peering through their telescopes but see nothing for about ten minutes.
A black speck appears and finally , after much time, is determined to be a Chinese junk.

The captain is amazed and congratulates the lookout, expressing his admiration for the
man's eyesight. The lookout says it had nothing to do with him and his eyesight, he knew
it was a Chinese junk because his little brother had heard them talking!!1