More than 3.5 million people's sexual preferences, fetishes and secrets have been exposed after dating site Adult FriendFinder was hacked.

Already, some of the adult website's customers are being identified by name.

Adult FriendFinder asks customers to detail their interests and, based on those criteria, matches people for sexual encounters. The site, which boasts 64 million members, claims to have "helped millions of people find traditional partners, swinger groups, threesomes, and a variety of other alternative partners."

The information Adult FriendFinder collects is extremely personal in nature. When signing up for an account, customers must enter their gender, which gender they're interested in hooking up with and what kind of sexual situations they desire. Suggestions AdultFriendfinder provides for the "tell others about yourself" field include, "I like my partners to tell me what to do in the bedroom," "I tend to be kinky" and "I'm willing to try some light bondage or blindfolds."

The hack, which took place in March, was first uncovered by independent IT security consultant Bev Robb on her blog Teksecurity a month ago. But Robb did not name the site that was hacked. It wasn't until this week, when England's Channel 4 News reported on the hack, that Adult FriendFinder was named as the victim.