I apply the fuggit, its a tiny pot theorem

[J. Sawyer]

I call down. fish call with good hands and raise when they think you blufff

[tolbiny]

How well do you know the villan. The vast ajority of the time that you get raised heads up on a flop like this they don't have a flush.
Secondly "passive" players who bluff riase this flop (or semibluff) will take a free card on the turn a high% of the time. against certain players calling the flop intending to fold to a turn bet can be correct.

[wonkadaddy]

don't raise, just call down.