Here's an oldie but a goodie...
Walking up to a department store's fabric counter, a pretty girl asked, "How much does this cost?"
"Only one kiss per yard," replied the smirking male clerk.
"That's fine," replied the girl. "I'll take 10 yards."
The clerk hurriedly measured out and wrapped the cloth, the held it out teasingly.
The girl snapped up the package, and said to a little old man standing beside her, "Grandpa, pay the man."