I asked him after the hand what he had and he told me 72. Asked him again and he said AA, asked him a third time and he told me AA. Although this is irrevelant cause he could easily be lieing it puts me a bit at ease.
I have been in plenty of AA vs KK hands and this one seemed like it was one of them.
Also keep in mind the position of the raises.
If he did have AJ0 or AKs hed raise from CO. Then a reraise from the small blind would almost definietely not provoke him into pushing with junk. I could only put him on AA or QQ and it seemed more probable that he had me beat.
To me my percentages came up in my head as:
AA- 70%
QQ- 20%
Anything else (bluff) - 10%
Considering I only had $18 in this pot I just thought Id drop it rather than play it.
Id definetly like to here some comments from players who have folded KK before.

Thanks for the replies.