The following joke illustrates the perfect example:
A woman was running late for work. She zooms along an
overpass. Unbeknownst to her, a cop seeking to make his quota in order to be promoted to
prime asshole is hiding behind a billboard at the end of the overpass; he measures her speed with a radar gun, takes off after her and pulls her over.
"Where's the fire?"
"What fire? I'm late to work."
"Is that so? What do you do?"
"I'm a
rectum stretcher."
"How do you do that?"
"I work all my fingers in until I have both hands all the way inside, then I stretch out the rectum until it's a big asshole."
"And what, may I ask, do you do with a big asshole?"
"I put him behind a billboard on an overpass and give him a radar gun."