I was the best door-to-door security alarms salesman for several years running.
The trick was to level a brochure on the kitchen table if there was nobody home.
How many letters are in the Christmas alphabet?
25... there's no 'L'...
An older couple were making their funeral arrangements. The cemetery salesman pointed out a plot that he thought they would like. "You will have a beautiful view of the swan pond," he assured them.
The husband didn't buy it, he replied, "Unless you will be including a periscope with my casket, I do not think I will enjoy it."