Implied Odds 2 to the flop

[Zybomb]

Exactly how much are these takin into account?

Example: Theres a standard raise from MP and you call from the button with AQs everyone else folds.

The Flop has a King and 2 low cards but it brings you 4 to the flush. Your opponent leads out with a pot sized bet. Pot Odds say fold this and there is no other players in the hand that may make this call to give you correct pot odds -- but is it a fold always, can your implied odds make up for this?

Sure he can see the flush a mile away, but say he has AK, the turn brings the flush so he decides to check (though he may lead out again) and you check behind him. I assume if the river does not bring a 4th of the suit, he will at the very least check call a small/medium sized bet.

If you flop a straight draw your implied odds would go up since it is tougher to spot (although your outs decrease by 1) HU do you always fold to a pot sized bet here?

Im assuming you do NOT choose to take the aggressive route by raising in this spot hoping for a free card, and or a turn steal if you miss.