Why don’t I have four?
If it makes you feel any better I have none and never have. Every time I go to the dentist they look at my xrays and assume my wisdom teeth have been pulled and sometimes don’t beleive me when I tell them I never had any. Guess it’s extremely rare to not have any wisdom teeth grow in.
You’re a bigger mutant than I am.
I don’t give a Scheisse! 
Ich liebe Dich anyhow!
Dummkopf!
Your Freund
Quasi der Modem
I had 6 wisdom teeth, four regular ones and two little tooth buds above the top ones about the size of peas. The doc took 'em all out while I was under conscious sedation. I think it was a Valium drip.
ETA: So to answer your question, just chalk it up to normal human variation 
My front tooth is the 4th.
Yeah, I had five. Now I have none.
I also only had 3, (now I have one). You’re not alone.
It happens, no big deal.
If it makes you feel any better, one of our cats only has three of her fang teeth (are they still called canine teeth in cats? shouldn’t they be feline teeth?). She didn’t lose one in a fight or anything either. She was born that way.
At least people won’t notice your missing wisdom tooth. Our cat looks like she’s always making a face of some sort.
One of my friends at work doesn’t have any wisdom teeth either, and neither does his middle brother [he’s oldest of 3 kids]. We’re waiting to see if his baby girl has 'em or not.
And some people think humans are not evolving!
I dn’t see that anyone has said the simple explanation. Sometimes they exist but don’t break through the gums.
There are only three in the X-rays.
Then you’re a variation on Cubsfan instead of a variation on me.
Well shit, I only had four.
Like Cubsfan, I never had any, visible or hidden. One dentist near retirement told me he had never seen a case of it before, but my current dentist said it wasn’t so rare, just somewhat uncommon.
Heh. My Dad doesn’t have any, and my mother had all four. I had two, my brother had four, my sister has none.
I didn’t even know it was that uncommon not to have them, since I grew up with people that didn’t.
I had four, but two of them came in completely sideways.
Before they were removed, I also had a considerable amount more money.
I only have two, which have never been extracted. That makes me half as smart.
I don’t have any wisdom teeth, above or below the gumline.