Grindr is sending all kinds of user data to third-party companies

Not sexy.Image: Thomas Trutschel/Getty Images Grindr has a communication problem.  The social networking app used by 3.6 million people has been doing more than simply facilitating hookups, and in the process has potentially put the privacy of its users at risk.  SEE ALSO: This new Grindr feature could persuade users to regularly get tested for