When you are sneezing try drinking some hot green tea... well not exactly during the sneeze - but you know what I mean.  The first time that I drank the green tea, it was an "accident" - but I noticed that I had quit sneezing.  The second time I drank green tea (during a sneezing "situation") it was purposeful... I quit sneezing as well.  Perhaps this "cure" only works in Walla Walla - perhaps not.  Let me know if it works.