Check this out. A Cornell hospitality study found increases in tips with various candy giving. The sample was 92 dining parties.

In Experiment 1, two waiters randomly assigned 92 dining parties to receive candy or not. In Experiment 2, a waitress randomly assigned 80 dining parties to receive either no candy, one candy, two candies, or one plus another candy. All servers then recorded the tip and bill sizes of those parties.

I think the best part, the strategy of giving an extra candy after. It’s like making someone feel that they are getting even better treatment.

However, the largest tips were given when the server offered guests one piece of candy and then “spontaneously” suggested that they take a second piece of candy (23%).

The conclusion:

These findings indicate that servers can get larger tips by giving their customers’ candy. They also suggest that this effect is attributable to the customers’ need to reciprocate for the gifts of candy.

I just wonder how candy can be used in other situations or how something other than candy can be used.