You are a regular at $3/$6. I percieve you as being very very tight. I'm not sure how you percieve me, but you are down a lot of money in hands we have played together, and I seem to stack you a lot with goofy hands. As of late you have fared better against me and are making a longterm comeback in terms of stacks won/lost between us.

We are playing 5-handed and UTG opens for $18 and I make it $70 on the button. I have $588 to start the hand and you cover. You and I both have no read on UTG.

You find KK in the SB, what do you do?

I think the coices are pretty firmly between 4-towning it and just calling. Folding against me is certainly not correct here.

If we 4-bet it, the hand is essentially over one way or the other and no more decisions will be made. Certainly if we 4 bet leess than all in and I call and the flop comes 8JQ with a whole bunch of some suit you don't have we can argue about check/folding or closing your eyes and shoving but in 90+% of scenarios we will be done with tough decisions.

Now let us play out the hand further, as if you had called. I probably put you on TT, JJ, QQ, or AK. UTG folds.

The flop is Q28 with two spades. You check and I check it back at you.
The turn is an offsuit J. You bet $84 and I make it $199.

Your play? If you fold the hand is over. If you 3 bang it the hand is over (that is to say, you have no more decisions to make no matter how I respond).

Let us now assume you call.

The river is an offsuit 4. You check and I shove. Call or fold?

I call preflop and assume I am ahead of you at this pt. It also gives us more information seeing what UTG is gonna do. He might reraise and will give more info on both your hands.

Flop. I like the turn check.
Turn. I either fold the turn here or plan to call down on both streets as long as an A doesn''t hit.
River. As played. I usually call.

Instafold turn. People don't expect others to fold overpairs in today's constant 3-4 betting preflop, especially considering you know villain has been playing tight and he knows that you know you expect him to show up with a big pair or better here.

As played to river, the same logic applies to the river, and since the usual "standard" line for 2+2 is that if you plan on calling he turn you should call the river if it is a blank. Thus, you fully expect him to call the river and are thus value betting and he should be folding.