A lawyer's dog, running about unleashed, bee-lines for a butcher shop and steals a roast.
The butcher goes to lawyer's office and asks, "if a dog running unleashed steals a piece of meat from my store, do I have a right to demand payment for the meat from the dog's owner?" The lawyer answers, "Absolutely."
"Then you owe me $8.50. Your dog was loose and stole a roast from me today."
The lawyer, without a word, writes the butcher a check for $8.50 [attorneys don't carry cash -- it's too plebeian -- and the butcher hadn't brought the shop's credit card imprinter to the lawyer's office].
Several periods of time later -- it could be the next day but that would be unrealistic -- the butcher opens the mail and finds a bill from the lawyer: $100 for legal consultation.