it's true that poker face can only be experienced in real life. but it can also be done through bet size and game time. Yes, actually this is also tricky
because anyone can bluff. So poker is a game that uses mental as well. most high roll poker they played with strong hand so rare people bluff, It also depends on the player.
i remember when we were young , and playing local Poker bluffing is really in effect specially in opponent that we knew has a soft character? those are the most losers in poker.
We can think that we are smart to bluff the opponent but we should remember that the opponent will not give up although they do not have good cards than us.
and bluffing must also be supported by cards and have a strong belief that you will win, and you will win if you play poker for a long time because you will master and read the opponent's game.
I really like playing poker because it will trigger an adrenaline rush when opponents bluff and feel challenged.