"The Blonde Detectives" joke

A policeman interrogates three blondes who are training to become detectives. To test their skills in recognizing a suspect, he shows the first blonde a picture for five seconds and then hides it. “This is your suspect, how would you recognize him? ”
The first blonde answers, “That’s easy, we’ll catch him fast because he only has one eye! ”
The policeman says, “Well, uh, thats because the picture shows his profile. ”
Slightly flustered by this ridiculous response, he flashes the picture for five seconds at the second blonde and asks her, “This is your suspect, how would you recognize him? ”
The second blonde giggles, flips her hair and says, “Ha! He’d be too easy to catch because he only has one ear! ”
The policeman angrily responds, “What’s the matter with you two?! Of course only one eye and one ear are showing because it’s a picture of his profile! Is that the best answer you can come up with? ”
Extremely frustrated at this point, he shows the picture to the third blonde and in a very testy voice asks, “This is your suspect, how would you recognize him? ” He quickly adds, “Think hard before giving me a stupid answer. ”
The blonde looks at the picture intently for a moment and says, “Hmm - the suspect wears contact lenses. ”
The policeman is surprised and speechless because he really doesn’t know if the suspect wears contacts or not. “Well, that’s an interesting answer. Wait here for a few minutes while I check his file. ”
He leaves the room and goes to his office, checks the suspects file in his computer, and comes back with a beaming smile on his face. “Wow! I cant believe it. It’s true! The suspect does in fact wear contact lenses. Good work! How were you able to make such an astute observation? ”
“That’s easy, ” the blonde replied. “He can’t wear regular glasses because he only has one eye and one ear. ”