The waves on the shore feels so good in that position and I honestly don't care if it could be a sexual thing. There, I admit it. Textile beachgoers are doing it too, anyway.
Group of 6 ladies (+1 guy offscreen) playing badminton, beachball, swimming, suntanning, etc., at a lake + some beachgoers, total indifference to nudity. The way it should be.