Ever since I went on that first nipple hole rant, I've been on the lookout for real life visible nipple holes/dents. I've actually seen a couple that look like there might be some kind of little divet, but it seems to be very rare. Still not sure what's going on with 'em. There was one girl who looked like she had one in one nipple but not in the other.
Are you referring to inverted nipples? I've actually read that there is a piece of tissue connecting the nipple to the body keeping it from being "normal" I believe that there is a surgery that can correct that also.
Nope, but that is interesting. I'm talking about a convex nipple with a small indentation in the center. So probably not from nipple piercing either, since I imagine that's always through the sides.
Here's a good real-world example of what Jessica's talking about (NSFW, of course): https://gfycat.com/AmplePoisedCattle
This probably goes without saying, but let's never make this a picture thread, haha.
Oops.
Well would you look at that. It looks like someone took scissors to them. Maybe it's a weird rare asian form of inverted nipples, It does seem to convey what you're talking about in the anime though I've never seen that.
I'm guessing this thread is going to be a surprise for any future Santan Ninja fans in a couple of years when the comic is huge and they go back to see how it all started lol.