Arnie walks into a pharmacy and asks for a pack of rubbers. The girl behind the counter asked politely, "What size, sir?"
"Gee, I don't know." Admitted Arnie.
The girl then instructed him to go out back so that he could use a special fence to determine the correct size. The fence had three holes in it.
Putting his penis in the first hole, Arnie felt capable hands gently stroking it. He pulled it out and put it in the second hole, and within seconds, he felt a warm sensation, one like he had never felt before. He managed to pull it out and stick it in the third hole. There, expert lips and tongue gave him the blowjob of his dreams. Jumping up, he staggered back through the door to find the salesgirl waiting for him with a smile.