Green Stamps

It's an older story than you might think. A "green stamps" version of it likely began in 1963, a version in which a lady, on her way to see the doctor, stops to relieve herself in a public bathroom. There's no toilet paper to be found so she uses a Kleenex from her purse. Unknown to her, a couple of trading stamps accidentally get transferred from the bottom of the purse to the lady's whatever. During the exam the doctor quips, "I didn't know you gave Green Stamps with that."