Here's something that's crossed my mind.... What causes a person to have a fetish? Can a fetish be distinguished as separate from a physical preference (race, height, build, etc)? For example, (and I'll try to keep it as PG as possible here), here are people who get sexually aroused by being urinated or defecated on. Why? Can this be considered a mental illness? What about if we simplify it a bit and as why a person is attracted to taller individuals rather than shorter? These are some broad questions, but I'm not really looking for any definitive immediate answers. I guess this should just act as a starting point for discussion. So... discuss!