 Other tales of teenage sex parties have circulated at various times.Folklorist Barbara Mikkelson of snopes.com associates the "sex bracelet" stories with similar ones of the past.In the 1970s, pulltabs from aluminum cans and labels from beer bottles were supposedly considered "sex coupons" and obligated any girl presented with one to sleep with the bearer; by the 1990s the rumors shifted to include an assortment of plastic items, including some worn as bracelets.