Mistake for an oyster still ok....if crab mistake cunt as sea shell aka home shelter, crawl and stay in it, then woman will really have a big problem...or a unique feature...depending on how you look at it.
Imagine every time some tom, dick or harry wanted to poke his organ into the orifice, the crab will come out of the hole and mistook the two balls as oysters.....
Alternatively, when all toms, dicks and harrys ceased to want to fornicate with the woman, she can go to the circus and become an exhibit of natural cunt nut cracker......or cunt ball picker, or cunt balloon burster, sure earn lotsa money....