I hate when people say any form of blessing when i sneeze. (Even before i was full on atheist) it's a dumb superstition. Got into a [verbal] fight with someone on how impolite i was for not saying it. And then within days, my ex gave me the same shit. Certain there was some (explainable) conspiracy happening to ensure I acknowledged the concern of a fellow human dislodging mucus or irritants from their nasal passages. I noticed after that, I started reacting verbally with the inquiry, "are you okay?" ... And years later, hearing my voice, I totally hear the tone accusing a sneezer of being somehow inferior to me. I'm almost positive that this condescending question is more rude than ignoring the sneeze with apathy.

Because it used to be thought that your heart stopped beating when you sneezed

There are imps and small demons that hover around us and attempt to enter our bodies when we sneeze. It was always thought that sneezing caused your good 'humor' (a kind of energy), to leave the body and though your body would regenerate more humors in a few seconds, the imps and demons would seize upon that moment to enter into you and do bad things. Coughs, burps, hiccups, etc. do not put enough humors out of the body to allow for the demons to enter. There, I hope I have solved this vexing problem to your satisfaction.