It's a sordid but familiar affair: An angry ex-BF sold the photos in a fit of pique, and then somebody stole them from the guy he sold them to and put them on the internet. Unless it's all lies.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.