Believe me, sand in the vagina is no laughing matter. I guess it could equate to having your balls sandpapered. It hurts and is in no way fun so this woman can't be right in the head.
Even so no amount of money could get me anywhere near a beach naked. (Is sand even sexy? Would anyone here be any less turned on in the absence of sand? It just puzzles me if there's even a demand for this.)