I once found a website about NLHE, that had a section about "sucker hands". It included valubale information, about how dangerous it is to draw to the lower end of a straight and other stuff beginners do wrong and tend to lose a lot of money with.

But there was one "sucker hand", which I am still not sure of. It was the nut flush vs. straight flush. So lets imagine the situation where you have Ace-x suited and you make your flush und the river. But the flush cards on the board are connected. You try to get as much chips from your opponent as paossible. You make a rather small raise and he pushes all in. Do you really put someone on a straight flush and fold in this situation? Couldnt he have made that same kind of play with a King high flush oder even a regular straight? Especially at smaller stakes?