Dan and Sally didn't have anything specific in mind, which made the shopping much harder. No matter what they looked at, none of the various costumes seemed right. Fortunately, the shopkeeper knew how to deal with customers like them.
"I've got a feeling you two are interested in a more realistic role play." After a few questions, he discerned from the couple that they wanted a set of costumes that would compliment each other, as well as having the side benefit of making intimate situations for after the party a little more fun. He offered them a pair of silver rings, each encrusted with the same beautiful blue stone. He explained how the rings would provide a way for the two to realize their mutual fantasies in a way no mere costume ever could.
"These rings will turn you into twins. You'll be identical in every detail."
Both Dan and Sally were skeptical about what the man really meant. For one thing, they were as different as any man and woman could be from each other. How could a costume change that, even a drag costume?
But eventually, after some more thought and a promise from the shopkeeper that they could try the rings and return them for a full refund within 24 hours, they decided to make the purchase. They listened to the man explain how to use the rings, partially in disbelief, but partially in hope that they might actually work.
"You two have fun with those rings," the man said, his chubby cheeks becoming even more pronounced by his broad smile. "But try not to let your fantasies go to much to your heads."