"One day a bachelor, who was a poor tipper, walked into his favorite restaurant and ordered lunch.
A new waitress served his meal and received a three cent tip. When he came in the next day, she thanked him for his 'generosity' and she said she could tell the character of a diner by the way he tipped.
'Yeah? What can you tell about me?' he asked.
'You put three pennies in a neat row,' said the waitress, 'and that shows you are a very tidy person. The first penny tells me you are frugal and the second tells me that you are a bachelor.'
'That's true,' he agreed. 'But what does the third penny tell you?'
'The third penny tells me your father was a bachelor too'"
