Okay...I didnt explain my point well enough I think. What I was trying to say is that if this guy has purely a flush draw he has already made a potsized bet and disintegrated his own odds with only one opponent who has position on him. So with having a vulnerable TPTK you can then make the decision to call and find a safe turn where your pot edge can be much larger to de-stack him. Basically if he is on a bigger draw than your read then you can pass up your small positive to small negative edge now...Make it a bigger edge on the turn and shove him off his now weaker hand there or allow him to donk off the rest of his chips in a futile bluff attempt.

You can reference ToP (dont have my copy on me but I know it's in there) and if you have any limit books then SSH explains it in limit terms with the "two overpair hands" Section.

PK