[betgo]

I thought about this and I think it is way too much of an in joke. Certain 2+2er types think flat calling is bad here, but might do it with a big pair to trap.

There are some problems with it. First of all random players often have no problem calling off a big chunk of their stacks.

Also, flat calling here with AA/KK is a pretty bad play, because the early position raiser often calls a push, and if he folds, you get an acceptable result picking up a sizable pot.

Also, flat calling here with AQs or 99 or something like that is not a terrible play. It certainly is a lot better than flat calling with AA/KK or 65s for that matter.

So the point is that only flat calling with AA/KK does not make a lot of sense even if there are certain pro players who do that, and there is no reason the raiser will put you on a big pair.

He will probably assume you have a quality hand. 65s is deceptive and sometimes hits or makes a draw you can semibluff with, but the call is still probably cEV-.