Stephen next time that you go into the Dentist tell them about this and make sure that they take some X-Rays. As stated above most likely your are impacted which can lead to problems down the road. As a matter of fact it could lead to some very painful problems at the last second when you least expect it. So the point is... Get them checked out.
he'd be lucky if they just weren't there, I guess some people just don't have wisdom teeth at all, maybe he only got 2. For his sake I hope so, I don't look forward to getting all 4 of mine removed (dug out)