calling stations

big loss in the beginning is KK vs AA preflop all-in. another interesting hand:

UTG+1: $1.85
MP: $2.00
CO: $2.10
Hero (BTN): $13.05
SB: $35.65
BB: $2.00
UTG: $10.70

Pre Flop: ($0.15) Hero is BTN with A A
UTG raises to $0.20, 3 folds, Hero raises to $0.80, 2 folds, UTG calls $0.60

Flop: ($1.75) 7 5 6 (2 players)
UTG checks, Hero bets $1.20, UTG calls $1.20 <- oops!

Turn: ($4.15) K (2 players)
UTG checks, Hero bets $3, UTG calls $3 <- wtf? I'm screwed!

River: ($10.15) K (2 players)
UTG checks, Hero checks

Final Pot: $10.15
Hero shows A A (two pair, Aces and Kings)
UTG shows J T (a pair of Kings) <- OMG!!
Hero wins $9.70
(Rake: $0.45)

i had a note on him saying "calling station" but still he freaked me out