Ever since video cameras became available to the masses in the VHS era, people have filmed themselves having sex. And celebrities are no exception.
Part 5 of Circa's celebrity sex tape history includes the saga of Hulk Hogan, whose court verdicts may have yielded the most lucrative amateur video payout of all time.
Hogan's scandal unfolded publicly in 2012, but the sex tape's origins date back to 2007.
Back in '07, Hogan was still married to Linda Claridge when he was filmed having sex with Heather Clem. At that time, Heather was the wife of radio host Bubba the Love Sponge, and Bubba and Hulk were friends.
After the tape leaked in 2012, Gawker published some of it, prompting Hogan to sue the website in March 2016.
Hogan emerged victorious, with two court rulings awarding him a combined $140 million.
While seeking to appeal the rulings, Gawker filed for bankruptcy in June.
In addition to essentially ending his friendship with Hogan, Bubba finalized his divorce to Heather in 2012. Four years after Hogan and Claridge finalized their split in 2007, Hogan married Jennifer McDaniel, who stuck with him after the sex tape scandal.
Claridge was less sympathetic. "I didn't find out about him having the sex tape until it became national news," she told Inside Edition about a week before the March 2016 verdicts.
"It's hard to believe... he [was] doing this kind of stuff behind my back."
Asked by Inside Edition if Hogan deserved any award in his trial against Gawker, Claridge replied, "No. Not at all."
Some of Kim Kardashian's sex-tape successors landed their reality shows first.
In recent years, "Teen Mom" star Farrah Abraham filmed her own sex tape with adult-film star James Deen.
"Love & Hip Hop" stars Nikko London and Mimi Faust also are among the celebrities who'd hoped releasing a sex tape after appearing on a reality-TV show would lead to new levels of fame and fortune.
Faust, as it turns out, once dated the same Stevie J who appears in Eve's sex tape.
As for the Kardashians, Kim isn't the only one who's made a sex tape.
In January 2016, her younger sister, Khloé Kardashian, admitted filming intimate moments with Khloé's then-husband, Lamar Odom.
"I've definitely, like, recorded myself having sex with my ex-husband," she told "Watch What Happens Live" host Andy Cohen. "But not like, talking to camera."
Don't hold your breath for that tape's release. Khloé claims the video is locked "in a safe."
Miss any of the other four chapters of Circa's history of sex tapes? Here's the video and article link for Part 1, which covers 1980 to 2000. Keep scrolling to see other chapters.
Part 2 covers Paris Hilton's video and other celebrity sex tapes leaked at the dawn of the new millennium.
Part 3, which covers 2004 through 2006, represents an era when celebrity sex-tape leaks surged.
Part 4, in part, chronicles the sex tape that launched the Kardashian empire as we know it today.
Which celebrity has the most significant sex tape? Vote in Circa's poll, and explain your answer in the comments section.
For more news of the day, check out our 60 Second Circa.