Why can you sense when you're being stared at?
 

Anybody have an answer?

It's a primal instinct...Predator/prey thing...It's a protective mechanism

We are still animals after all :)

I can't sense it. *shrug*

Then again, I'm always getting stared at due to phenomenal good looks and awesome physique so maybe I'm just used to it.

You could sense that?

I'd tend to lean somewhat towards this direction too.
You can "see/observe" things in your peripheral vision that you might not immediately take into account, if you're being stared at/watched you'd more than likely pick not only this up, but the body language behind it, the glances away when you try to confirm whether or not they're doing it.
I wouldn't call it so much sensing it as seeing it - sure, your body is giving you some primal type messages on account of your (in most cases) peripheral input, but it's still just another way to see things that you might not directly notice.

My say.

I'm talking about how can you sense when you are being stared at when the person(s) is behind you.

I don't think you can.
If there's something like that going on I'd still say it was either predominately a PV thing, and maybe slight reactions from others around that tell you something/someone is looking at you.
Yknow, you see those documentaries...the deers/gazelles or whatever, all in a group, it starts somewhere, one will look kinda slightly, then a another...etc...people probably do that too, in a way, and some small part of them would consider it "stalking" behaviour, and instinctually "keep an eye" on it, while trying to go about unnoticed as much as possible, so as to not shift the focus of the "predator" upon themselves, and maybe you're like, picking it up from them.
Wow.
Getting deep.
So stoned right now.

nope, I mean feeling it without any type of visual cue.

It's more of an assumption really, haven't you ever gotten that feeling when there's nobody else around? I think a lot of it depends on what you're doing too... really, it's just all in your head. It's an interesting feeling though, I know what you're talking about, I just think it's not quite a developed sense.

i've never experienced that sensation in my life.


then again - i'm the one that does all the staring.