answer:“Scientists have yet to come up with a good explanation for why most people sneeze the predictable two or three times, while others are wracked by staccato attacks. But the answer seems to lie in an individual’s unique immunological and neurological constitution.” – Source My dad sneezes three to five times, my older brother usually sneezes twice (sometimes has one, big sneeze), my younger brother sneezes once (sometimes twice), my mother exclusively sneezes once, and I sneeze twice (when I sneeze only once, it feels strange. Like I still have another sneeze in me.)