Help me play KK preflop

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Villain has a deep stack (over four buyins, although I can only play him for one buyin) and has been bullying the table recently with raises and reraises.

PokerStars No-Limit Hold'em, $0.02 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($17.98)
SB ($2.81)
Villain ($22.97)
UTG ($2.63)
Hero ($4.88)
CO ($1.97)

Preflop: Hero is MP with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls $0.02, <font color="#CC3333">Hero raises to $0.08</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">Villain raises to $0.20</font>, UTG folds, <font color="#CC3333">Hero raises to $0.50</font>, <font color="#CC3333">Villain raises to $0.80</font>, <font color="#CC3333">Hero raises to $2.42</font>, Villain calls $1.20.

1. Can someone explain the preflop betting to me? When he raises to $0.20 he could be trying to steal the pot as usual (maybe he doesn't notice how tight I'm playing). When I reraise to $0.50, he must realize I have something, but why does he reraise so little? If he had a small pocket pair he would call and play for set value. If he had a large pocket pair or AK he would make a large reraise, inviting me to go all-in. Why would he put in another $0.30 and reopen the betting?

2. How is my bet sizing in this hand? I'm obviously trying to get all-in preflop. Should I have moved all-in on my last bet, or would that cause him to fold too many hands I can beat? I was surprised when he called instead of reraising, but it's not a bad outcome for me. If an ace comes on the flop and he moves in, I have an easy call getting 2-1 pot odds. If three low cards come on the flop and I move in, the same odds encourage him to call with a medium pocket pair.