One kiss

At a fabric store, a pretty girl spots a nice material for a dress and asks the male clerk: How much does it costs? “Only one kiss per yard,” replied the male clerk with a smirk.
“That’s fine,” said the girl. I’ll take ten yards.”
With expectation and anticipation written all over his face, the clerk quickly measured out the cloth, wrapped it up, and then teasingly held it out. The girl took the bag and pointed to the old man standing beside her, and smiled, “Grandpa will pay the bill.”