Re: QQ heads up vs limp raiser
 

I have seen people LRR with low pocket pairs frequently enough. I think they mistakenly put you on AK, then remember that a low pocket pair is a favorite over AK.

Capping is questionable. No one will fold, and I don't think you are ahead 50% of the time after the LRR.

After you capped, your opponent still bet into you. It is either a bluff or a monster. If you raise and are 3-bet, will you have learned enough information to fold? I don't think so. It's ok to catch the bluffs by calling down.

When the king hits on the turn, if your opponent doesn't bet, you can bet for value, and fold to a check-raise.