Context in art (social and physical) - calling things out as meaningful

 In "Playing to the Gallery", Greyson Perry states that putting something into a gallery is one thing that makes it art. This has bothered me for a while, because the object is unchanged. However, on reflection, the context is vitally important too, and the context has changed. By putting something into a 'special space', you are calling it out, you are saying "look harder at this thing, there is meaning to be taken from it", you are literally putting it on display and inviting people to use it as an object for personal reflection. There are clearly analogies to religion here - galleries and churches are both special spaces, that are intended to push people in them to look beneath the surface of the things they find therein, bread in a shop is for eating, bread in a church is for reflecting on people's relationship to the divine. A urinal in a toilet is for pissing into, it pretends no deeper meaning, a urinal in an art gallery implies/teases/promises deeper meaning that will reward inspect and reflection.

How have other people used context to 'sell' meaning? How can I use context to sell meaning/ideas/experiences?