It's one of the most notoriously kinky landmarks at Burning Man, even though a majority of the 80,000 people at the event never visit it, or even notice it when bicycling by. 

In Black Rock City, a lot of Burners like to play, touch and get to know each other in an intimate fashion, and the Orgy Dome is just one of the places on playa where you can do so.

At camps all over the temporary city, there are opportunities to learn how to flog a partner during "open dungeon play" or get sponged in a "human body wash." Burners can also get a "naughty nude portrait" or a print of their privates in the traditional Japanese method of Gyotaku.

"(Burners are) doing what they want to do, but it's not a free for all," said Donna Rae Watson, director of the Bureau of Erotic Discourse, a large camp at Burning Man that teaches Burners about sex. The key being consensual sex.