What does it take to make you fold KK pf?

If I see a raise, re-raise, and another re-raise all before it comes to me I would CONSIDER folding KK. Even vs. a raise and re-raise there are just too many other hands that could be villian's holding to make KK a reasonable fold.

I mean, I know that I re-raise w/ JJ, Q, AK (and of course KK and AA) to isolate a pot.

Or is there really no exception and all the money should try to get into the pot PF w/ KK?

I ask this because I just lost KK to AA twice within like 5 hands (luckily only at the NL25) and someone was criticizing my play saying I should have laid down the KK pf and that he lays KK down on a regular basis to a storng re-raise.

I just don't think folding KK is good in any scenario, but the real question is what do YOU guys think?

Thanks