Chess Knight Move

Walking up to a department store’s fabric counter, a pretty girl asked, “I want to buy this material for a new dress. How much does it cost?”
“Only one kiss per yard, ” replied the smirking male clerk.
“That’s fine,” replied the girl. “I’ll take ten yards.”
With expectation and anticipation written all over his face, the clerk hurriedly measured out and wrapped the cloth, then held it out teasingly.
The girl snapped up the package, pointed to a little old man standing beside her, smiled and said. “Grandpa pay the man.”