($22) AK, Is this just plain stupid?

[HighestCard]

UTG was an average player. Anybody else do this or am I an idiot?



Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (8 handed) converter

CO (t1398)
Button (t800)
SB (t1765)
BB (t1550)
UTG (t620)
UTG+1 (t747)
MP1 (t375)
Hero (t745)

Preflop: Hero is MP2 with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises to t100</font>, <font color="#666666">2 folds</font>, Hero calls t100, CO calls t100, <font color="#666666">3 folds</font>.

Flop: (t345) J[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">UTG bets t100</font>, <font color="#CC3333">Hero raises to t225</font>, CO folds, UTG folds.

Final Pot: t670

Why not raise pre flop?