Idiot got lucky and hit his KJ. Was he Asian? At Bay 101, lots of Asians will bet open ended straight draws or nut flush draws as if its a made hand such as top set.

i have a 0% b/3bet range hu ip on any flop. anybody that c/raises oop, will be betting the turn pretty damn near 100% of the time.

While I don't see what's wrong with semibluffing with those hands against aware players (what else is better to semibluff with?), you have a point about Asian culture. I've gotten the impression that Asian (which here is usually Vietnamese) players, especially women, often follow a particular pattern in both LHE and LO8: bet or raise with any good draw on the flop and turn, then only rarely bluff a miss on the river, and often don't vbet the river enough either.

It makes me think that there might be a cultural propensity to gamble just to gamble, i.e. to juice the pot when the outcome is still in doubt for the thrill of seeing the last card win or lose a big pot, and that it has relatively little to do with balancing value 3-bets to be GTO.

I think this is one of many examples why trying to enter into the psychology of your opponents is huge.

This, with the exception for players who are very spewy.

Agree with everything you mention. I think there are many who just make the pot as large as possible hoping they "get lucky." Problem is ... sometimes they do and it costs a lot for you. Yikes.

In the long run that's not a problem.

Fun digression: Rumor has it that the $20/40 game here is horribly unbeatable because there's so much collusion. I may be naive, but in the fewer than 100 hours I've sat in it, I didn't see anything terribly collusive. What I saw was "vendettas": UTG + 1 opens 80%, HJ 3-bets 70% of the 80%, Button caps 50% of the 56%. Everyone fires lots of bets on the flop, fires a few bets on the turn, plays straightforward on the river. In everyone's (non-Asian) mind, that's collusion and makes the game tough.

Of course it's very beatable with a huge standard deviation. As HEPFAP says, mining the nuts preflop is a "stupid way to play poker" but it's gotta be very +EV.

I think every decision you have made thus far is correct, and I think 3betting the flop is a significant error. I would just call the river, but I think it is close and could be persuaded to 3bet with the right read in a live game.

Right, read dependent on the river. I don't think MUBSY people wait until the river and then XR second set of tens, a set of fives, or worse here. A rivered set might be expected to get a little excited but 44 and for that matter 99 make no sense given previous action. KJ is really all that makes sense, so just call.