Things I don't get #1

[sweetjazz]

A typical example would be something like this:

A TAG players opens UTG, a bad player in the CO calls, and you 3bet on the button with Ac Ad. Everyone else folds, UTG and CO call. Flop comes Kh 5h 3h. It checks to you, you bet, UTG raises, CO cold calls.

You should flat call and plan to raise a non heart, non king turn.