Walking up to a department store's fabric counter, a pretty girl asked the clerk, "I want to buy this material for a new dress. How much does this cost?"
"Only a kiss a yard, " replied the smirking male clerk.
"That's fine," replied the girl. "I'll take ten yards."
With expectation and anticipation showing all over his face, the clerk hurriedly measured out and wrapped the cloth, then held it out teasingly.
The girl took the package, smiled a big smile at the clerk, and then pointed to an old man standing next to her. "Grandpa will pay the bill! Goodbye!" she laughed and walked away.
I don't understand this joke!