A lawyer's dog, running about unleashed, beelines for a butcher shop and steals a roast. 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 an envelope from the lawyer: $20 due for a consultation.