(razz) Why do they bet here? What should I do?

[RustyBrooks]

Razz ($1/$2), Ante $0.20, Bring-In $0.25 (converter)

3rd Street - (1.40 SB)

Seat 1: xx xx 9[img]/images/graemlins/spade.gif[/img]___folds
Seat 3: xx xx K[img]/images/graemlins/diamond.gif[/img]___brings-in___folds
Seat 4: xx xx T[img]/images/graemlins/heart.gif[/img]___folds
Seat 5: xx xx 7[img]/images/graemlins/spade.gif[/img]___folds
Seat 6: xx xx 3[img]/images/graemlins/club.gif[/img]___folds
Hero: 3[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img]___completes
Seat 8: xx xx 8[img]/images/graemlins/spade.gif[/img]___calls

4th Street - (3.65 SB)

Hero: 3[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img]___???
Seat 8: xx xx 8[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/heart.gif[/img]___bets


Why on earth does he bet here? Because he thinks it's a pure steal? Should I raise to show I'm not FOS? What about 5th if I brick? If I check-call here I think I have to fold 5th if I brick, and I guess I should even if I raise here because it'll still only be like 2.5bb in the pot. But he could have total crap here and I'm drawing to a live, strong hand.