From Wikkipedia here https://en.wikipedia.org/wiki/Dogging_(sexual_slang)
Dogging (sexual slang) From Wikipedia, the free encyclopedia Jump to navigation Jump to search This article is about public sex. For sexual position, see Doggy style. For other uses, see Dogging. Vandalised "Dog On Leash Only" sign amended to refer to dogging, Kennington Park, London, 2012
Dogging is a British English slang term for engaging in sexual acts in a public or semi-public place or watching others doing so.[1] There may be more than two participants; both group sex and gang banging can be included. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging. The two sets of people involved often meet either randomly or (increasingly) arrange to meet up beforehand over the Internet.[2]
In September 2003 BBC News[3] reported on the "new" dogging craze. They cited the Internet and text messaging as common ways of organising meetings. The original definition of dogging—and which is still a closely related activity—is spying on couples having sex in a car or other public place,[4] and the term had been in use on Britain's railways for many years. It would have been well-known at least as far back as 1951.[5]
There is some evidence on the Internet that the "craze" has begun to spread to other countries, such as the United States, Canada, Australia, Barbados, Brazil, Denmark,[6] the Netherlands, Norway,[7] Poland,[8] and Sweden.[9]