Barbara Williamson co-founded Sandstone, one of the most famous radical experiments in group sex and communal living of the 1970s. Then she got wild.

The aftermath of a childhood filled with subway flashers, teachers who asked for hugs, and boys who joked about your breasts.

Four men stood on the edge of the Shenzhen Health and Family Planning Commission, threatening to jump in protest. They referred to themselves as “China’s 21st century eunuchs,” damaged by medically-dubious surgeries.

The Cosmo editor and author of Sex and the Single Girl’s rocky real-life relationships.

What it was like to report on feminism for Playboy in 1969.

After a flawed sexual assault investigation, a Naval Academy instructor made it his mission to prove he did nothing wrong. The discovery of a lost cell phone told a more complicated story.

The immersive mise en scène of a Hollister flagship store, redolent of California beach towns that don’t exist, “lazy, hygienic sexuality,” and weed.

“Word choice is hard here. Should we say “raped” automatically if a grown man has sex with a teenager? Does it matter at all if the 15-year-old, now much older, describes their encounter as one of the best nights of her life? What is our word for a ‘yes’ given on a plane that’s almost vertically unequal? Does contemporary morality dictate that we trust a young woman when she says she consented freely, or believe that she couldn’t have, no matter what she says?”

In a matter of months she became one of the world’s most famous porn stars. Three years later, she was dead. The rise and fall of Savannah.

After a year of tumult and scandal at Tinder, ousted founder Sean Rad is back in charge. Now can he — and his company — grow up?

The rise of the king of American swingers.

A small-town coffeeshop owner led a double life as a blogger and podcaster on the topic of “pickup artistry.” Then his identity, and his intimate writings about his experiences with 46 local women, was made public.

They were an organized group of ex-strippers, plus a few role players recruited from Craigslist. They fished for marks in strip clubs, Wall Street cocktail bars, and even TGI Fridays, and then lured them to strip clubs. The marks woke up with little memory of the night before and their credit cards maxed out.

A stripping trip to Florida gone horribly astray told across 158 tweets.

A love triangle between two married professors and the dean goes public.

On the wives of whalers and their dildos.

The writer’s relationship with two Moroccan prostitutes.

A former prostitute turned arctivist and her taxi-driver husband go undercover in Iraq’s brothels.

Ed Houben, a self described “ugly man,” has sex with multiple women each week, sometimes two in one day. The women, often accompanied by their husbands, are trying to get pregnant.

The technological future of the struggling porn industry.

The meanings of coiffure, from follicle to shaft.

Meet Britain’s “Batman of obscenity.”

The life of a trans woman on the border between El Paso and Juárez.

On the adultery website AshleyMadison.com.