Imo, it's really your environment that will expand your horizons. As many have shown, look at how your outlook on sexuality has changed since entering the hobby (both as a hobbyist or as a provider). Reading on the board about people's exploits and what turns some on / off, what people like to do, etc. and the constant exposure to it can really change one's thoughts on what was previously taboo and unthinkable to them.
You actually see a very similar effect when people go to college, for example. At many universities (I won't say all), as a student, you're forced to interact with people from varying different social, financial, and racial backgrounds from what you grew up with. Being constantly exposed to that expands your mind and makes you more open and better at dealing with people from all walks of life in the future.
So you can think of ECCIE as a kind of free form sex college!