Imagine: without thinking you’ve just spit your chewing gum on the streets. You might even feel guilty about it being there on the streets for the next 20 years. But now imagine you did all of the above, but instead of the chewing gum being on the street for at least 20 years, a mysterious woman comes around. Secretly collecting the gum from the street, putting it in one of these clear plastic bags and one month later you see a familiar face, your face, hanging in an art gallery.