Ok, the idea is not new: combine two of the camp beds to make a double sunbed with the bed functionality for sex.
This one is a little different in it's realisation as it also keeps the original functionality (lieing on the back, sunbathing)
for both sides of the double-camp-bed.
The triggers for the sunbeds are at either sides (the wood parts),
the trigger for the bed functions are the surface of the upholstery (without the pillow in the middle).
Have fun at the beach!