NL25 SH Set vs fish

PartyGaming - $0.25 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 3

CO: $30.38
BTN: $40.61
SB: $25.34
BB: $68.89
Hero (UTG): $25.00
MP: $25.00

SB posts SB $0.10, BB posts BB $0.25

Pre Flop: ($0.35) Hero has 6♥ A♥

Hero raises to $0.75, fold, fold, fold, fold, BB calls $0.50

Flop: ($1.60, 2 players) 6♦ 6♣ 8♣
BB checks, Hero bets $1.14, BB calls $1.14

Turn: ($3.88, 2 players) 3♦
BB checks, Hero bets $2.76, BB calls $2.76

River: ($9.40, 2 players) 2♠
BB checks, Hero bets $6.69, BB raises to $13.38, Hero raises to $20.35 and is all-in, BB calls $6.97

The same player from the hand with QTs.This hand happened at the same table few minutes after that hand.I must have been on tilt because he made the same move but now on the river.Why do you raise on the river at this stakes, you raise for value.But he could also have any overpairs JJ QQ KK AA.

Board: 8 :heart:6 :spade:6 :club:3 :diamond:2
Equity Win Tie
CO 48.84% 48.84% 0.00% { A :heart:6 }
BU 51.16% 51.16% 0.00% { JJ+, 88, 33, 54s, 54o }