Via Uproxx:

It may be an unfamiliar sex term to you, but apparently, dogging refers to a huge sex fad in Britain. It was more popular ten years ago, but a glimpse at news stories in Britain even in 2015 suggests that it’s still very much a “problem” in the country.

So, what is dogging? Basically, it involves two people notifying a bunch of randos on the Internet that they are going to a car park to bone in their automobile. While the couple is having sex, this group of strangers from the Internet gathers around the car, watches through the windows, and masturbates.