Make somebody happy.

I was at a supermarket the other day, about to pay my bill. 

"Do you have a Vector Card?"  She asked.

"What's that - a reward card, or something?"  I asked.

"That's right."  She replied cheerfully.  "Would you like to know all about it?"

"Oh, no."  I replied.  "My reward is seeing you, my dear."  I replied, with a wink.  It made her day.  She was still chortling to herself as I left.:-D