Wiffle Piffle is a little bald-headed mustachioed door-to-door salesman. He gets rough treatment at each house but he's undeterred. Finally, he rings Betty Boop's door and begins singing to her. She isn't interested but at least she's polite. The man tries again at the side door with the same, "No thank you, sir" sung back at her.
Finally, on the third effort he's invited inside to show his ware, some of which are very clever like the mousetrap cheese invention and the clothes cleaner. Betty's reaction to the first one is a giggle, followed by "Isn't that ducky?" (I love some of these old expressions.)
The last part is almost shocking as the man's vacuum cleaner goes a little too far! Although not overly humorous, this is a cute and likable cartoon with an adequate number of sight gags to keep you entertained.