Why do I do this to myself?

Don't have the exact hand history, sorry.

PS $11 Tournament
About 1450 started, down to about 450, avg. stack is about 5000. Blinds are 100/200.

Relevant stacks:
SB: 7000
UTG: 2500
MP: 1100
Hero (Button): 5000

Hero is Button with K [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/heart.gif[/img].

No reads, only been at the table an orbit or two.

UTG limps, MP goes all-in for 1100. Hero ?. Will post the rest when I get a few replies as whether or not to raise or smoothcall.