[pokergrader]

I fold all pocket pairs higher than 66 to avoid this very phenomenon.

Since you only win like 4 bets if AA wins, but you lose 100 bets when you lose, it has actually increased my EV.

Likewise with 66 and below, I lose 4 bets when I don't flop a set, but win 100 when I do, and it keeps me out of tough situations.

Its called the Gap Theory: The gap between how much you win when you hand is good, and how much you lose when it is bad. Its like the first thing you need to learn when switching to no limit.