HU preflop

[toke]

"SB makes it 20k, you have 72o, what do you do?"
I fold, call or reraise (I can make a meaningful reraise without committing myself)

"SB makes it 20k, you have AQo, what do you do?"
I call or most likely reraise

"SB makes it 60k, you have AQs, what do you do?"
I call or most likely reraise

On OPs question: I'd fold most of the time because If I make any meaningful reraise I'm committed. I'd have to have very good reason to believe: 1. villain is able to fold a hand after putting in that kind of raise 2. villain has been very aggressive from the button 3. i have established a very tight/weak image.