What does he make this turn raise with?

I only sat down at the table about 8 hands ago, so I don't have many reads yet. Villain seems LAG but not really out of line. I just can't figure out the turn raise... pocket 2's? So far I've given him no reason to think I'm getting out of line.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.05/$0.10
5 players
Converter

Stack sizes:
UTG: $34.30
CO: $4.25
Button: $11.80
Hero: $9.70
BB: $12.95

Pre-flop: (5 players) Hero is SB with 8 :diamond: Q :diamond:
UTG calls, 2 folds, Hero calls, BB checks.

Flop: 3 :spade: 3 :diamond: 8 :heart: ($0.3, 3 players)
Hero bets $0.2, BB folds, UTG calls.

Turn: 2 :heart: ($0.7, 2 players)
Hero bets $0.4, UTG raises to $1, Hero calls.

River: A :spade: ($2.7, 2 players)
Hero checks, UTG bets $3, Hero folds.
Uncalled bets: $3 returned to UTG.

Results:
Final pot: $2.7

Well, I think the simplest explanation is he has a 3 in his hand for trip 3's. Of course, he could always be bluffing. But in an unraised pot, you did the right thing by folding in the end, I think. People will limp in with lots of stuff UTG on a short-handed table, he could have had A3 or any suited connector hand with a 3 in it.

Of course, I fold too much anyway! Without knowing the tendencies of your opponent, the safe thing to do is just fold and let the small pot go.

i play the same probably and im guessing he had a 3.