Rocking is "changing things in your brain," Schwartz says. The Swiss scientists are eager to try the rocking bed on night-time sleepers, to see if it might help with insomnia and other common ...

Built for indoor slumber or stargazing outside, the Rocking Bed comes with a rubber stop that allows you to lock the bed in place or let it move freely. We'd advise using it on hilly terrain.

Xtasia, which was voted the UK's top swingers' club, in 2014 has built its own indoor dogging wood complete with fake trees and rocking vehicles.