THE WORST BODY PARTS

  1. The back of knees.
  2. Under the tongue.
  3. The corner of the eye near the nose that squeaks if you press on it.
  4. Taint.
  5. Palms.
  6. Scrotum.
  7. Top of big toe.
  8. Behind the ears
    Suggested by   @ChrisK
  9. Scalp
    Suggested by   @celine
  10. Inside of belly button.
    Suggested by   @Grosstastic