More than anything, Bob, who is city-bred and short in stature, wants to be a cowpoke.  Taking pity on him, a rancher decides to hire the lad and give him a chance.

"This," he says, showing him a rope, "is a lariat.  We use it to catch cows."

"I see......." says Bob, trying to appear knowledgeable, as he examines the lariat.

"And.... just what do you use for bait?"