Nearly 13 million Americans aged 18 or older who are on social networking sites will accept any social media connection request from a member of the opposite sex, regardless of whether or not they know that person, according to a recent survey. The survey of 1,011 U.S. adults, of whom 387 have joined an online social networking site, conducted via telephone by Harris Interactive® on behalf of ID Analytics last month, also found that men on social networking sites are more than twice as likely as women to accept any and all invites from someone of the opposite sex (18 percent compared to seven percent for women).