It was 1989. Robert B. Cialdini was a 43-year-old college professor and self-proclaimed "patsy" – he answered every phone call, even during dinner, and patiently listened to the telemarketers on the other end of the line. And then he would inevitably buy something.
But every time he made a purchase, he felt taken advantage of, embarrassed, and utterly disinterested in ever buying anything from that company ever again.