A good song and a good twist on the old jokes:

DEATH OF A SALESMAN
(Steve Goodman, Steve Burgh, Jeff Gutcheon, Jim Rothermel, Lew London, Saul Broody & Ken Kosek)

The traveling salesman stopped for gas as it was getting late.
He sure was feeling tired and it was snowing on the interstate.
He said, "Won't 'cha fill 'er up with gas and see if my oil's alright,
And do you know a place where a tired-out traveling man might spend the night?"

The attendant winked at him and said, "I'll bet you been around.
The man who puts up lodgers here is known as Farmer Brown.
You'll find him in that old stone house just at the edge of town,
And he's got a 15-year-old daughter who likes to fool around."

The salesman winked right back at him and a smile came to his lip.
He paid for the gas and oil and then he gave that man a tip.
He started up and pushed that old gas pedal to the floor,
Went off like a hat, and in nothing flat, he was at the farmer's door.

The door opened up and a beautiful girl said, "won't you come on in?"
The traveling salesman's tongue was hanging out like Rin-Tin-Tin
"That old gas station attendant said I would find you here,
And do you have a suitable room to rent to me, my dear?"

She said, "Kind sir, I'm sorry, but the last one's gone, you see,
So if you want to spend the night, you'll have to sleep with me."
He said, "How fortuitous, my pretty little miss!"
And he throws his arms around her and he gives that girl a kiss.

Her warm and tender ruby lips he scarcely could believe.
He never saw the hammer she had hidden up her sleeve.
She said, "I'm getting sleepy, why don't we go to bed?"
And as they turned to climb the stairs, she whopped him on the head.

The very next day the salesman's car with brand new license plates
Was sitting at Farmer Brown's Super Service 'bout a mile from the interstate.
So all you traveling salesmen who might be passing through,
You better watch your step or that traveling salesman joke might be on you.