I think I’ve noticed a correlation between nipple sensitivity and how easily someone is tickled. Could just be a sample-size fluke, though, so I’d like to get some more anecdata.
Do you consider your nipples to be an erogenous zone, and are you ticklish? I’ve also split the responses into male and female; if you don’t particularly identify as either gender, feel free to flip a coin.
I’m a female, my nipples are sometimes but not always an erogenous zone, and I’m ticklish as hell. You could probably tickle me through the computer, if you tried hard enough.
…
STOP IT! 
Apparently you are my twin.
My nipples are in the top two erogenous zones 
and I don’t consider myself ticklish.
ETA: The more I think about it, I guess I am actually ticklish. I hate hate hate being tickled and everyone knows that so they don’t tickle me. So, I want to change my vote to #1.
I don’t know exactly how to answer that. Does it count as ticklish even if it’s discomforting enough I want to break the partner’s fingers?
I’m not ticklish. “Tickling” annoys me, but it doesn’t make me squirm and laugh uncontrollably. It’s just irritating to have someone forcefully fingering my armpit.
But I love me some boob action. I love it when Mr. Serenata goes to town on them… very erogenous.
Pretty much this, except that these days my nipples are always an erogenous zone. This was not always true, but has been for the past several years.
If I even think someone is about to tickle me, I shrink away and start giggling endlessly. Yes, I am ticklish, and yes, the gals are an erogenous zone.
For the purposes of this poll, “ticklish” includes *but does not require *“enjoys being tickled.” All it means is, “has some reaction–positive or negative–to being tickled.” I.e., that you are *capable *of being tickled.
I’m super ticklish, but I don’t enjoy boob-play.
Well, (female), they’re erogenous and I voted as not ticklish. But, I have one tiny spot on my back that makes me squirm, but it’s an uncontrollable squirm. I forgot I had that spot, until I was having an MRI done and a cord was accidentally laid across my back. I wiggled uncontrollably then. So, I wouldn’t necessarily say it’s a ticklish spot, but it can be. 
I didn’t vote because none of the options felt right.
-I am extremely ticklish.
-My chest isn’t really an erogenous zone. Sometimes it is, sometimes not.
-My lower back, mrowr. My boyfriend’s a bastard for alternating tickling and back-stroking.
Totally ticklish, totally erogenous zone.
I’ve been talking about my boobs an awful lot lately. 
We’re triplets!
Male. Nipple play does not work for me at all. While I’m not ticklish to light touch, if you know what you’re doing, you can tickle me with heavier touch. Still, I consider that ticklish, and thus chose the appropriate option.
I also have the ability to usually suppress any reaction, as long as I’m expecting it.
ETA: Types of ticking, so you can see they are different phenomena
Male. I’m not ticklish (I quite enjoy a touch my wife considers unbearably ticklish), yet my nipples are extremely sensitive, to the point that a loose T-shirt sometimes irritates them badly, and I can’t normally touch them even myself. I attribute this to my unusually small nipple size: a large number of nerve endings on a very small area.
Aren’t the vast majority of people ticklish to some degree?
Possibly. I’ve known at least two people who AFAIK aren’t ticklish at all. One of them was ticklish when she was younger, but after spending an entire car trip as a child being tickled by her sister, was never ticklish again. The other has never been ticklish.