Why does gently putting finger under nose supress the sneeze?
On the subject of supression. If you feel a yawn coming on, quickly breathe in and out through mouth. You can do this whilst keeping mouth just slightly open so noone knows. Useful for boring meetings! Except for the slightly dodgy noise you will make.
Can't believe the answers, I'm crying with laughter here! Maybe there are only so many sneezes allowed every day so when yours is lost someone else gets it lol!