For the sake of brevity, I'll just slightly change the name of this thread to:
How to make love to a JW on the sand.
It can be done. In fact, if you're both very careful, it could actually be enjoyable.
But if either of you wiggles too much (imposes your beliefs on the other) or the wind (family, elders) kicks up, the friction could be a deal breaker.
Open Mind