Don’t know if you can teach me to stifle it, man, it might be just something only some people can do. But, any sneeze, any size, I know I can reduce it to a sound not dissimilar to a car dump valve releasing. From time to time I purse my lips the wrong way though and a gay little whistle comes out, which can be embarrassing. Sometimes I think I'm gonna splatter my brains out my nose when I sneeze. It's really loud and high pitched. Loud sneezin' doesn't bother me, but people who sneeze with their mouths open does! I do cover my mouth and nose and turn away from everything when I sneeze. Also, if it's a really bad environment for a sneeze, I'll pinch the top of my nose when I feel it coming, and that often stops me from sneezing at all. Not sure how. I just think it's rude to scream-sneeze in a quiet office.But sometimes you just can't help it!!