A3s - but typical of some of my hands

[newb1]

Hello, mostly lurking - first hand post.

I'm facing these sort of situations where I'm seeing aggression without holding the best hand. I'm guessing I've got MUTBS and sorta want some affirmation that it's ok to jam these more..

No reads on villain, he just sat down.

Party Poker 1/2 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is MP3 with 2[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#666666">2 folds</font>, MP2 calls, Hero calls, <font color="#666666">2 folds</font>, SB completes, BB checks.

Flop: (5 SB) J[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG checks, MP2 checks, <font color="#CC3333">Hero bets</font>, SB folds, <font color="#CC3333">BB raises</font>, UTG calls, MP2 folds, Hero calls.

Turn: (5.50 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, UTG folds, Hero calls.

River: (9.50 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">BB 3-bets</font>, Hero calls.

Final Pot: 15.50 BB