Calling flop bet ip you can sort of discount chances that you will get outdrawn to a better flush a little cause there's a chance you can get a free card on turn. Also note that one important spot to discount your implied odds a little is when you have an OESD on a two to a flush board because when it comes out with the third flush card people will be wary of draws and you will have pretty big reverse implied odds.

Good thread btw