Touch Illusion
Touch Illusions, also referred to as tactile illusions, refer to methods of manipulating the sense of touch to fool the mind about the actual temperature, shapes and sizes of items that are being touched or handled. For example, imagine a drop of water that is amount to land on your toe and you don't know whether it is hot or cold. When it lands, your toe will register an extreme of temperature and will not automatically identify heat or cold. There are many websites available that demonstrate these types of illusions.