Ive been grinding 4nl since november. Ive put in around 100k hands. One thing I noticed is how often AA and KK go head to head. The odds are 1 in 25 but it feels like a lot more. I see it happen every single day if not to myself. So far I have ran KK into AA 16 times. I hero folded 4/5 pre correct, stacked off 10 times, and managed to negate losses another time on a Q xx Q x runout. I have yet to crack AA with KK. The one time I slammed the K, he backdoored the straight. Ive only had AA vs KK 5 times. Three of these times I have lost, two of the pots being multiway and juicy on tables I had 150BBs. Here is one of my preflop folds with KK:

Seat 1: Tadashi201 ( $8.04 USD )
Seat 2: GagePhineas ( $4.00 USD )
Seat 3: blufferKittyKat30 ( $20.31 USD )
Seat 4: TookiePoker ( $3.88 USD )
Seat 5: dagrump23 ( $4.35 USD )
Seat 6: pocketx2 ( $1.44 USD )
Seat 7: toniredfern21 ( $2.63 USD )
Seat 8: d33p5t4ck3d ( $4.17 USD )
Seat 9: lycowolf ( $8.57 USD )
Tadashi201 posts small blind [$0.02 USD].
GagePhineas posts big blind [$0.04 USD].
** Dealing down cards **
Dealt to d33p5t4ck3d [ Kd Ks ]
blufferKittyKat30 folds
TookiePoker folds
dagrump23 folds
pocketx2 folds
toniredfern21 raises [$0.08 USD]
d33p5t4ck3d raises [$0.35 USD]
lycowolf raises [$8.57 USD]
Tadashi201 folds
GagePhineas folds
toniredfern21 calls [$2.55 USD]
d33p5t4ck3d folds
d33p5t4ck3d shows [Kd, Ks ]
toniredfern21 shows [As, Qd ]
lycowolf shows [Ac, Ah ]
** Dealing Flop ** [ Th, 2s, 7h ]
** Dealing Turn ** [ 8d ]
** Dealing River ** [ Qc ]
lycowolf wins $5.39 USD from main pot
lycowolf wins $5.94 USD