Sneezes are pretty normal bodily functions; everyone lets one rip on occasion. However, there are certainly times when sneezes should be repressed at all costs. An uncontrollable sneeze that occurs when you're driving, for example, can have disastrous side effects. Some people's sneezes make them pass out behind the wheel. It would also be incredibly embarrassing to have a booger-launching sneeze when you're sitting right next to your crush; you wouldn't live down the embarrassment.
If you've never been in such a predicament, it's likely hard to imagine why sneezes are so gross and embarrassing. Redditors know all about this particular type of mortification, though. Maybe you can learn from their mistakes.
During a test in ninth grade Spanish class, I sneezed a few times in a row and blew snot everywhere. My hands, pants, the test papers and the desk had huge globs all over them. I had no tissues or really anything else to clean it up. So there I sat helpless. Someone I had a crush on was sitting 3 seats away. I couldn't even look up from my disaster zone out of fear that they were looking at me.
But I needed to finish that test. So I wiped the snot from the test papers and then rubbed my hands together until it essentially congealed. And then I continued on with the test.
I was sitting in Pizza Hut with my wife having a peaceful lunch. On the next table was... the English pop singer / song writer Paul Young, together with some friends. I had atrocious hay fever at the time and was suffering quite badly. From the depths of my body came a mighty sneeze. Not quick enough to pull out my handkerchief, I tried to catch it in my open hand. I failed... hanging from the back of Paul Young's head was a mighty lump of snotty flob enmeshed in his bouffant hair. I didn't have the heart to tell him, so if you are reading this Paul, I am very sorry. We paid our bill and left and the flobby snot was still dangling there.
I was sick one day home from school. I was going to get something to eat for lunch. I sneezed on my way into the kitchen and had diarrhea all over my shorts.
The sneeze-shart. Pretty self explanatory.