Finally I hit the Jackpot, I accepted a ping from love field for a rider with a 5.0 rating, got to the transportation network area and called, they informed me that they were at baggage claim, I replied by we can't pick up from there and that I need them to come down downstairs and I will direct them to where I am at. I had to circle around since it was so hectic and too many cars. Long story shot I got this couple on their early 60's in the car and drove them home. The end of the trip I got out to get the bags out and wished them a good night and that's when the gentleman said " here you go " with his hand extended. I reached out and grabbed what looked like a solid item. I looked down and it was a peace of cheap candy. So the old man tells me " you really did a good job and that's how I tip people that do a good job" . My quick response and without thinking was " sooooo, if you go to a restaurant and the waitress served you, do you tip candy" he said "absolutely " my brain froze and couldn't carry a conversation anymore. I said have a good night and left. I felt bad afterward and felt it was my responsibility to educate this man and inform him that could be taken as an insult to some people . What should I have said to let him know that it wasn't ok without hurting his feelings?