A dumb Newbie question...

Is there ever a time when it would be smart to fold AA pre-flop.? What I'm really asking is would anyone NOT go ALL-IN pre-flop if you were being raised and you were holding pocket AA?

I was raised all in by pocket KK and me and another guy holding AA also went all in. Of course a K comes along on the flop and this guys cracks both of our asses. This was only the 5th overall hand of the SNG and we had already seen 2 different hands prior to this with pocket AA's.

I'm usually very conservative on at least the first 2-3 rounds of blinds unless I see an opportunity. I thought this one was one of those.

I don't like going All-in unless I know where I am on the board. Even with AA it feels like a coin flip, although I know AA is favored if the other guy doesn't get lucky.

Would anyone have folded? I almost did but saw it as a chance to at least double up (triple up when the guy next to me also called).