Peanuts

A tourbus driver is taking a load of seniors on a tour when he is tapped on his shoulder by a little old lady. She offers him a handful of peanuts, which her gratefully munches up. After about 15 minutes, she taps him on the shoulder again and she hands him another handful of peanuts. She repeats this gesture about 5 more times. When she is about to hand him another batch, he asks the little old lady: why don't you eat the peanuts yourselves?
"We can't chew them, because we've got no teeth", she replies.
The puzzled driver asks "Why do you buy them then?"
The old lady replied; "We just love the chocolate around them."