Self-driving vehicles have been expected to bring all kinds of futuristic benefits including smarter cities and safer streets and highways.

But some U.K. researchers have identified a potentially more risqué repercussion of the autonomous vehicle revolution: more sex in cars since no one has to be behind the wheel.

More than a dozen automakers and companies such as Uber, Lyft and Alphabet’s self-driving car company Waymo have been testing autonomous vehicles.

While some accidents have slowed those tests, overall safety is expected to be enhanced with autonomous net-connected vehicles, with researchers estimating up to 90 percent of traffic accidents could be avoided, write U.K. researchers Scott Cohen, a tourism and transport professor at the University of Surrey, and Debbie Hopkins, a geography and environmental researcher University of Oxford, in the Annals of Tourism Research.