I was playing some 50NL HU and it finally sunk in
I kept reading about it on FTR, I heard it everywhere, but I still didn't know which hands to choose when to 3b people light

as I was playing I noticed I got hands that I'd raise myself, but since he was on the button he'd raise first and I would tend to fold them
hands like 96s

but then it dawned on me, I should use these hands, which are the top of my folding range to 3b him light since he raises/folds his BU
there was no 4betting going on, but he did flat my 3b a lot so I had to find hands that still had post-flop value to 3b him light with