Nearly 4 million people’s very personal information has been exposed to the world, after a hacker broke into the database of Adult FriendFinder in March.

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.”

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Included in the exposed personal information are customers’ email addresses, usernames, passwords, birthdays and zip codes, in addition to their sexual preferences. No credit card data has yet been uncovered as part of the hack.

That data is incredibly revealing and potentially damaging.

Sociopaths all over the Internet are already salivating over this data — including the white supremacist criminal (CNN describes him as “controversial”) known as “weev:”

Andrew Auernheimer, a controversial computer hacker who looked through the files, used Twitter to publicly identify Adult FriendFinder customers, including a Washington police academy commander, an FAA employee, a California state tax worker and a naval intelligence officer who supposedly tried to cheat on his wife.

Asked why he was doing this, Auernheimer said: “I went straight for government employees because they seem the easiest to shame.”

Millions of others remain unnamed for now, but anyone can open the files — which remain freely available online. That could allow anyone to extort Adult FriendFinder customers.

And of course, our sociopathic stalker pal Chuck C. Johnson is ON IT, because he’s utterly obsessed with other people’s sex lives.

We are trying to find all of the government officials who are on #AdultFriendFinder thanks to the hack. Join us at editor@gotnews.com

— Charles C. Johnson (@ChuckCJohnson) May 22, 2015

We’re going to publish the names of everyone with a .edu account on the #AdultFriendFinder leak.

— Charles C. Johnson (@ChuckCJohnson) May 22, 2015