This is normal. If you really want to know the animal's sex, I would either call the seller or get it popped/probed by a veterinarian. Speaking of the seller, why don't you contact them and ask for information about keeping the animal? If they sold you a Burm instead of a corn snake, you might be able to confront them and potentially swap out your animal, assuming he even has corns.
Thx but I wouldnt trade my snakes for anything. On the papers it said 0.0.1 witch is unknown sex. so that wierd tounge flickering is normal with only the end of fork sticking out?