100NL Weird line from villain

[Rakshasa]

no reads in this player and no history between us, pretty early in the session.
His stats turned out to be 11/8/2.60 over 99 hands but I didnt have those avaliable when this hand occured so tips on all streets vs both a complete unknown and a guy with those stats are welcome

6 handed
Villain ($190) is UTG and raises to $4
2 fold
Hero ($123) is on the button with T[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/diamond.gif[/img] and 3bets to $12

<font color="blue">I suppose cold calling is perfectly fine here OTB vs an UTG raiser?</font>

SB folds
BB folds
Villain calls $8

Flop: ($25.50) 4[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img]
Villain bets $18
Hero [img]/images/graemlins/crazy.gif[/img] [img]/images/graemlins/confused.gif[/img] [img]/images/graemlins/crazy.gif[/img]