i sent producer ricky ratliffe to check one out in oklahoma. >> reporter: dr. smith runs the surgery center of oklahoma, a private surgery clinic that posts prices online. >> in the waiting room, you look at menu and go okay. >> we don't get a health care menu in other places. >> yeah, to know going in everything is covered and parenthetically i didn't have to pay for $100 aspirin. isn't that cool? >> reporter: shoulder surgery costs $6,000. it would have cost five times that at the hospital. people can find out what the hospital will charge. >> we couldn't get a price quote from other hospitals. we would call and they looked at us with a blank stare, no one would give us a price. one day someone gave us a quote of around $15,000 and the price for this surgery was a third of that. >> reporter: he needed his bicep reattached after a canoeing incident. >> it was cheaper to pick up and move and pay rent in oklahoma city for two months and pay for cabs and buses than stay in new hampshire and get surgery there. >> reporter: luke carter needed knee replacement. afte

john: my producer, ricky ratliff went to sometimes square to try her own hug experiment which i willdr. zachary researches, oxitoxin, helps people cooperate. >> we were wondering why prosperity lives in some countries, not others. we began studying the role of trust and to really understand that we wanted to get a biological basis why we trust strangers. john: we trust strangers because of a certain chemical in our body? >> it functions to cause us to reciprocate always. you are nice to me, i'm nice to you. essentially the biological basis for the golden rule. john: by hugging people, people release more of this hormone -- >> oxitocin, which also makes people happier? >> happier. healthier -- oxytocin. promote cooperation without anybody telling us we have to. john: my producer got full frontal hugs from dozens of strangers. i was surprised very few turned her r down. some people ran to her. >> she is running. >> she is running. she is running. we're doing this.m >> so i'm in the middle of my hug experiment and i'm problem 40 hugs in. i have hugged men. i have hugged women. i hugged