A policeman is training three men, Bob, Don, and Rod, to become detectives.

The policeman flashes an image of a suspect at Bob for five seconds, and then asks him, "This is your suspect. How will you catch him?"

Bob replies, "Well, sir, that's easy! He only has one eye!"

The policeman replies, "That's because the photo I showed you is his profile! He doesn't have one eye!"

He goes to Don next, and does his usual thing.

Don replies, "That's a piece of cake! He only has one ear!"

To which the policeman says, "Well, that's because the photo I showed you IS HIS PROFILE!"

Pissed off at this point, he goes to Rod and asks him, "This is your suspect. How will you find him?"

Rod looks at the picture intently, and the says, "The suspect wears contact lenses."

The policeman is confused, and decides to check. Moments later, he emerges with a big smile on . his face and says, "Wow! He really does wear contact lenses! How did you make such an astute observation?"

"Easy. He can't wear regular glasses because he has only one eye and one ear."