I have too much hair.
Also my claws could use a makeover.
I could most definitely do without my buttcrack.
I have enormous feet (size eleven) and long, skinny toes. On the rare occasions that I find a pair of really cute open-toed sandals in my size, they invariably highlight the excessive length of my toes.
My nose. Looks like a strawberry.
I’m not fond of my toes either. On both feet my second and third toe are partly grown together. Which is a strange sight.
I can swim very well though. 
I am not particularly found of the outside, although supposedly, it’s what’s inside that counts.
Dammit, Hecubus, I’d have to say the ugliest part of your body is that damned t-shirt I sent you. Oh, and your black heart for making me take that damn bet . . .
Tripler
I feel so violated.
Well, leaving out internal body parts like my pancreas, appendix and hypothalamus, I’m going to have to opt for the scrotum. Aesthetically, scrotes just aren’t that attractive. Sure, it’s functional and my own personal bundle of joy, but who ever takes a look at one and exclaims, “Damn, what fine looking scrotum you’ve got there!”?
My great toes toenails. Damaged by injury…thick, mishapen…I make love with my socks on.
This is a gross generalisation. Speak for yourself.
Well, I’m well past the midpoint of my 4th decade, and my liver’s gotta be lookin pretty ugly by now. My lungs can’t be very easy on the eyes, either.
But if it’s gotta be something you can see without slicing me open or jamming tubes in my orifices, then I’d have to say my feet. I’ve got big, hairy topped, long toed, ingrown-nailed, scaly, varicose veined, stinky cheese feet. I keep socks on them at nearly all times just 'cause they’re so ugly.
PS. And Ginger, some of us men like stretch marks… don’t treat 'em like they’re ugly. They’re a mark of accomplishment.
Well, I’m always willing to be the smarass.
The land mass of Antarctica is about 14,000,000 square miles. We need to know the longest dimension to determine mapsize, so let’s assume that Antarctica is a perfect circle for simplicity.
14 million square miles works out to a circle with a radius of (area = pirr) 2,111.5 miles. A diameter of 4,223 miles or 267,569,280 inches. If the scale is 1 inch = 140,000 inches, this gives a birthmark around 1,911 inches across, or 159 feet. It’s a good thing your ass isn’t that big.
Assuming your birthmark is of decent size (say 3"), you probably want something more on the scale of 1:100,000,000.
The only part I do not like about my body are my hips. They’re too big for my body. Then again, I’ve kind of grown to like them so I guess I shouldn’t say their ugly, just a bit of an annoyance when I want to buy pants. It’s hard to find the right size.
Right at this moment, the ugliest part of my body is my left knee. This is not only because there are currently two big ugly scabs on it from when I tripped over my own feet and fell on the sidewalk and scraped the skin off (strangely, with no damage to my pants), but also because whenever I fall down somewhere, that’s where any injury occurs.
My right pinky is immobile and that side of my hand is kind of weird looking because i haven’t used it in 30-some-odd years and there’s a plastic bone in there. I say the right side of my right hand isn’t pretty.
Since I can’t say my entire body - my face.
My stretch marks are pretty scary, too. I also have the odd little toes, but I think they’re interesting.
I hate to say this, but I always thought the outer labia (inner too) weren’t anything to look at. On me, for sure, but also on most other naked women I’ve seen in a compromising position. I think naked bodies of all sizes and shapes are amazing, beautiful works of art, but extreme closeups of female genitalia don’t thrill me.
Hmmm…Totoro, how you doin’? Let me know when that clears up, mmmkay? 
I forsee problems in the future should this be changed…
I should say that to foxboy just once, to boost his self esteem for the rest of his life. Think it would work?
Personally, I’d like my stomach to be a little more toned, but I just am too lazy to do anything about this. I have rather broad shoulders, (thanks mom), and even though I think my butt is too big foxboy thinks it is so sexy. He has a fascination with my butt, constantly pinching me and slapping me. I have to walk away from him facing him just so he won’t grab my ass. So I’ve gotten over the “I have a big ass” thing and now I think it’s just fine.
Other than that, I’m happy with my dimensions. Nothing really ugly about this body, except for a little bit of acne on my upper back, right below my neck and between my shoulder blades. Ick. It’s going away though, so looks like there will be more Naked Time[sup]TM[/sup] for me and Totoro.
I have some light stretch marks on the outside of both my breasts, my inner thighs, and on my hips. They don’t bother me much.
I agree with Cranky about the labia not being aesthetically pleasing. I think that women’s bodies, no matter what they think is wrong with them, are beautiful works of art. But this isn’t exactly the most beautiful part of the female anatomy, so…yeah.
I’m done here, I think.
My big toes. The nails seem to be prone to flaking towards the inner edges, and on my left foot where the nail got lasered to correct an ingrown toenail, about 1/4th of it from the inner edge out always flakes off. It’s annoying, and ugly.
I was hoping I could be the first to do the Zappa thing.
My vote goes to the back of my heel. It is covered in blisters from wearing wet roller skates.
Sorry ,but you may have tp wait until the water turns Green