KK pre-flop - "To fold or not to fold - that is the question"

[B1GF1SHY]

There are countless times where I have had KK preflop, re-raised someone and had them come over the top for another 3x my raise. I told myself, "I'm almost positive he has AA, only AA plays like that". I push all-in thinking everyone on 2+2 doesn't fold KK preflop to anything at SSNL, so I shouldn't either. Anyways, from the last 12 times I've had it happen, I've only won once when the person had QQ. I'm starting to think folding KK preflop isn't so bad.