55 on paired flop

[Stalrock]

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 4 Players
LegoPoker Hand History Converter

SB: $56.50
BB: $168.10
Hero (UTG): $99.50
BTN: $143

Pre-Flop: 5[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $4</font>, BTN folds, SB calls $3.50, BB folds

Flop: ($9) J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $6</font>, <font color="red">SB raises to $12</font>, Hero folds

I had no reads on the guy. Are you guys dumping this everytime, or do you guys sometimes call one and re-evaluate the turn? Or, Re raise?