SOUND-ENVIRONMENT INTERACTION

 Answer 

When you tap your index fingers together, the impulses will arrive simultaneously at the brain. However, when you tap your lips, which are closer to the brain, it is the lips that seem to be the site of the stimulation.
When you tap your ankle, much farther away, you are more likely to identify the finger as the site of the stimulation, since impulses from the ankle arrive later. Was that your experience?