Double-Nose Tactile Illusion
Position your fingers as shown below. (Two views are presented.) Basically, you are just crossing your index and middle finger.
Now, slowly run the small "gap" between your crossed fingers along the ridge and around the tip of your nose. In the interests of science, a gentleman has posed to reveal how easily it is done. You should feel two "phantom" noses under the tips of your index and middle fingers. Apparently, your motor-brain is tricked into thinking that each finger is touching a separate nose!
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