The point of surrealist art is to tap into your subconscious. This includes dream imagery. You can also try to fool people's perceptions - a lot of surrealist art likes to mess with the senses.
Meret Oppenheim's piece juxtaposes fur and porcelain, making the viewer imagine what it would be like to use furry utensils.
I love Max Ernst
really damn cool Rene Magritte piece, this is what I meant with the perceptions business.
