“The best psychological tease in poker is to never be critical of an opponent’s play. When you tell an opponent he made a mistake, particularly if you’re sarcastic or mean-spirited, you’re making him uncomfortable.
Then he’s unlikely to do the same thing again against you. You’ve made him play better, for fear of being ridiculed.
But you’ve done something far worse. You’ve cut yourself off from your main stream of profit – the discretionary hands at the low end of that opponent’s selection spectrum. “

http://www.poker1.com/archives/10689/mike-caro-poker-word-is-tease