People don't sneeze for fun. They sneeze because something triggers the sneeze reflects, and as long as the reflex keeps being triggered, they will keep sneezing. I have mild sneezing type allergies--fortunately. Several times a week I will sneeze a few times. I then blow my nose to clear what was loosened by the sneezing, but also to remove whatever was causing the sneezing. I don't enjoy it, and nobody "enhances" their sneezes. It is not fun, but it can be messy, which I hate. I also have a climate allergy which makes my nose constantly run. YUCK! Even the slightest change in temp or humidity causes my nasal faucet to flow. I can go from standing/sitting to the reverse, or go from one room to another, and the slight difference in temp/humidity from one room to another, or from what it is at the upper/standing level, as opposed to the lower/sitting level of the room, makes my nose run. This is a CONSTANT problem, and drives me nuts. Eating foods that are hot, or cold, or spicy hot, also causes the nasal faucet to run. If I could afford it, I would buy stock in tissue companies. If I had all the money I spent on tissues over the years, I would be well off. Strangely enough, in spite of all this, I never seem to have sinus infections. I only recall ever getting one, and that was caused by a demented mosquito that visited me while I slept. It tried to extract blood several times from right over a bony sinus area, and apparently kept missing blood vessels. The over dose of itchy anti coagulant it injected to get it's drink of blood got into my sinus there, and caused problems for days, and not just itchiness. It also made me feel woosy. I found that the menthol in Solarcaine helped some, though.
Yes, I do think your hearing sensitivity is why it bothers you so much. I have hearing sensitivity too, so I do understand, but fortunately, mine isn't as bad as many others on the spectrum. I have had to turn down job assignments due to work place noise. Sometimes it isn't always possible to avoid an unpleasant noise. At home I run a fan or radio white noise when sleeping, to muffle the sounds from outside, but it doesn't help when the next door neighbor comes or goes on his motor cycle.
Remember, people don't sneeze for fun, or to bother you, so stop taking it personally.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau