Third nipple here too, but normal number of molars, I’m no freak.
I have one chest hair that grows out to be over an inch long (I pluck it). I have no other chest hair, save for a few tiny ones around my nipples, and very little body hair. On the other hand, I still have to get my head hair thinned at age 48. Also, I have somewhat high testosterone, which kind of puts the lie to the theory that you’re supposed to be bald and have a chest rug or something when you have it.
All four of my rear molars came in twisted and impacted. By the time I had to get braces, they were holy hell to dig out. Ruined my dentist’s golf swing for weeks. 
I also have the root systems from hell (thanks, Mom, for that genetic donation! :rolleyes: ). They always come in fours and wind their way up into or near the sinus cavities. Fun, fun.
I’ve had too many root canals to count over the years and every oral surgeon that has worked on me has taken pictures while working on me. I have a feeling I’ve been in more than one dental journal in my lifetime.
I have slightly better than 90-degree peripheral vision. My dad’s was about 100 degrees.
My left foot is a quarter-inch longer than my right, as is my left leg, which has contributed greatly to the degenerative disk issues in my lower back.
I have oddly long toes, which people typically do not notice, but which is obvious when compared to other people’s cute little toes. I can pick stuff up with them like Surly Chick, which is very useful. Only one of my wisdom teeth have come in at age 25 and it came in sideways. (I have to get that looked at and I figure the dentist will be able to tell me if I have more coming.) I can wiggle my eyes back and forth rapidly to give people the oogies. I am deaf.
According to my genetic testing at 23andme.com, a few mutations/genes I have are a genotype which ought to make me a decent sprinter, one which means that being breastfed may have raised my IQ, lower odds of getting Hepatitis B and leprosy if I were to be infected, slightly increased episodic memory, reduced sensitivity to the scent of sweat, and increased sensitivity to pain. Genetics are awesome, man. The same site also let me know I have a variation on a gene that could have caused my deafness, but it’s not a for sure thing.
I have no sense of smell.
My tongue is scalloped all round the edge. I think this is a symptom of some sort of thyroid problem, but I haven’t followed that up any further because I don’t like to go to the doctor.
I don’t know how it happened, but I hold my pencils “wrong” as well. My elementary school teachers tried and tried to correct it, but I just wasn’t comfortable holding the pencil the normal way. I think I snap my fingers the way normal people do…
I Googled those. I get them too, if I’ve been doing a lot of walking. They always went away after a couple of days, though, so I never asked anybody what they were. I tend to avoid doctors unless something is clearly wrong and it’s not clearing up on its own.
I found out the ring fingers longer than the index fingers isn’t, strictly speaking, a mutation. It has to do with the level of testosterone you were exposed to in the womb. Whether it has anything to do with pedantry, I don’t know.
I hold the pencil “wrong” right-handed but “correct” left-handed. (My left-handed writing is terrible, but both are worse if I try to switch positions.) I am also a ring-finger snapper.
not a problem
Is your name Adam?
My clavicles are visibly asymmetrical to each other, but it doesn’t affect anything that I can tell.
I also hold my pencil funny, have a third nipple, and have pinky toenails which grow straight upwards and are incredibly tiny. My partner mocks me that they don’t exist, but they do; you just can’t really see them. They look like tiny letterboxes in my toes. I can turn my tongue upside down in both directions, but can only curl the left side of my lip. I can’t wink.
Both middle fingers curve outward toward the ring finger at the top joint. Also, I have one connected earlobe and one unconnected earlobe.
Another thing I didn’t know was not the norm. Mine are, too.
PHOTIC SNEEZE.
That is interesting condition.
Thanks for googling that! I thought everyone’s ring fingers were longer than their index fingers. Thanks for the testosterone bath, mom. 
Well, that’s just weird.
I have a modified variety of that - I only sneeze when looking at the sun, not just any light. Apparently my maternal grandpa was the same.
I have very dexterous toes. I can spread them out like fingers on my hand, so that no toe touches another. I use them to pick up stuff off the floor without bending over. If I ever lose both my hands, I’m covered.
I also have eyes that are green, but brown near the pupils. Not hazel, it’s two separate colors. My optometrist said that was unusual. I really like the way my eyes look.
I have this as well.
I have blue eyes, my wife has brown eyes with a tinge of green. Our daughter has eyes with a distinct outside blue ring, and an inside green ring with flecks of brown in it.
Evidently most of you all eat asparagus and your pee stinks, luckily mine does not. I found this out a couple of weeks ago when we had some good friends over for drinks and a bbq and after we served some asparagus.
After dinner one of them went to the bathroom and came back and mentioned that the pee stink sure happens fast, and everyone else was agreeing and I was like WTF you talking about. After the other three people (including my wife) told me, I was like, really? So I have had it twice since then and still no smell. From the little I have read online either I have no smell ability or there is some genetic disconnect as most people have this issue but there are some mutants such as myself who can enjoy our asparagus stink free.
Alton Brown claimed in his episode on asparagus that there are two factors at work: some people produce urine that smells, some don’t, and some people can smell the smell, and some don’t.