Society as a whole has been conditioned into averting from all things that are aesthetically unpleasant; exploring this behavior is what Katrin Baumgarten discusses in this understanding disgust keynote.
Most people have been raised into avoiding anything unpleasant and instead shift their focus on beautiful, eye-pleasing aesthetics. The power of disgust is present in the everyday lives of people. A car accident or badly designed gowns are things that capture the attention of people and entices them into establishing some form of relationship with those things.
Introducing a design with unpleasant aesthetic can greatly intensify the user and object relationship. Disgusting things fascinate people; it forces people into acknowledging subjects or creations that they never would have addressed, if they were just regular mundane objects or scenarios.