5CD: free play on BB...i toss 22, keep AK.

[Big Limpin]

Is this dumb? It kinda felt right. Maybe standard play for some of you? I can't recall ever tossing my only pair before:

-5 handed limit draw, I was on the BB, dealt AKx22.
-Fold, Fold, Limp, Fold. Check.
-Hero draws 3 to AK. Button draws 3.
-Hero bricks and checks, button bet, hero fold.

I'm undecided if this was +/-EV, help? [img]/images/graemlins/confused.gif[/img]

Couple thoughts:
When the button limps, most often he has a short - in his mind, "not good enough to raise" but he still wants to play it, so 22<him<KK, usually. He draws after me though, so i wont know for sure. If he limped because he is drawing, then AK and 22 have equal showdown value to me.

I think i improve the AK more often, and it will beat his unimproved hand, but the deuces will make stronger hands, like 222 might beat him if he improves.

I'm torn, thoughts?