Spots where calling with the nuts is correct on the flop?

[sc000t]

Ok, I really don't like playing with so many people in omaha. The shorter the better imo, but thats another story. So my reasoning is probably different (way off) from the normal way of thinking for 6max tables.

Reads: was playing HU vs utg when all these guys sat down and ignored us when we asked to play HU. They all seem tight passive players from the few hands. Don't recognize any regs and nobody has been playing agro.

PokerStars Pot-Limit Omaha High, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($79)
Hero ($174.55)
Button ($90.35)
SB ($89)
BB ($101.55)

Preflop: Hero is MP with J[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img].
UTG calls $1, <font color="#CC3333">Hero raises to $4.5</font>, Button calls $4.50, <font color="#666666">1 fold</font>, BB calls $3.50, UTG calls $3.50.

Flop: ($18.50) Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets $18</font>, UTG raises $42, Hero calls/raises ???


Ok, so heres my question. What spots do you flop very good hand, even the nuts and still only flat call bets on the flop?