https://www.vice.com/en_us/article/3abn49/sex-tourists-cruising-maspalomas-dunes

Public sex in sunny, warm sands is a fantasy a lot of people share. “Cruising,” seeking out anonymous sex in semi-public spaces, is a long-held tradition for queer communities for both safety and fetish reasons: for some people, parks, woods, and beaches are the only places people can find sexual partners without outing themselves to their communities. 

In a paper in the January 2022 edition of the Journal of Environmental Management, and published online as an open access article, researchers from the University of Las Palmas de Gran Canaria and Flinders University in South Australia explored the impact of sex in sand dunes on the Spanish island of Gran Canaria.