Nl10 Kk

Opponent stats 23/7 AF:2 3bet:0(0/67) fold to 3bet:40(2/5) WTSD:32 W$SD:50 after 175 hands.

I think he has AA,KK, because he insta 4bet me and he looks nitty by his prf and 3bet stats.

I know that everyone says you can't fold KK pre flop , but there are some situations where you just know that your opponent has AA, but you still call his shove, because there is a rule that you can't fold KK. I think in some situations is +EV to fold KK. If you fold KK pre flop , when you know that your opponent has KK+ range, you will win money in long run, because he won't fold KK pre flop, when you have AA. For him is just a bad beat and he thinks what he will get his money back from you when you hold KK and he has AA, but if you got very good reads on your opponent and in certain situations you fold KK pre flop, think how much you will win from him in long run?

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.05/$0.1 No-Limit Hold'em (8 handed)

Known players:
[tg]MP2$14.13:///////;MP3$10.00:///////;CO$14.85:///////;BU$11.07:///////;SB$7.78:///////;BB (Hero)$10.00:///////;UTG2$10.00:///////;MP1$15.46:///////;[/tg]

Preflop: Hero is BB with K:c, K:s.
UTG2 raises to $0.40, 6 folds, Hero raises to $1.30, UTG2 raises to $3.00, Hero ???