Duke University is recruiting female students to take part in a research study involving Tupperware-style parties where sexual toys are discussed and purchased. The study is being led by Dan Ariely, the James B. Duke professor of behavioral economics in the Fuqua School of Business. He declined to discuss the purpose of the research, saying it could taint the results. Yesterday(11/5/09) Duke pulled an ad from the university Web site that promoted the study and recruited volunteers for it. According to the ad, participants would fill out an initial questionnaire about sexual attitudes and behavior and then attend a one-hour “sex toy party” where they could discuss the devices with each other and buy them at discounted rates. Two months after the party, they would have to fill out a second questionnaire online.