I hate it when people say "bless you" (or similar) after I sneeze. I know they mean well. I know the origin of the phrase, that it's supposed to be "polite", it's tradition, etc., etc. But knowing all that on some rational level doesn't change the fact that it really annoys me. I successfully ignore it most of the time, but still can't help thinking it.
I'll try to explain why. Sneezing in itself is already unpleasant for me. It interrupts whatever I'm doing. It's out of my control and I don't enjoy that. It's basically my body malfunctioning! And what people are doing is making a comment. When I cough they don't feel the need to make a comment. When I fart they don't feel the need to make a comment. Yet when I sneeze, for some reason, they feel the need to make a comment! It's like they're saying "hey, look - you just sneezed!" I want to reply "Oh really? Thank you for pointing it out or I may not have noticed!" The thing is, I just want to forget about the sneeze and get back to whatever I was doing as soon as possible, hopefully before something disappears from my short-term memory (eg. if I'm programming), but now, in addition to processing the sneeze itself I have to process their comment and then my mental reaction to their comment. I start thinking something like "damn it, it's so stupid and unnecessary and unpleasant and right now I know I'm now supposed to be thanking them for it, but I won't, damn it! I wonder if they'll think I'm rude because of that? Maybe they'll say "bless you" again and keep distracting me and... aaarrrgh!!"
OK, it's not really as bad as I described all the time, but still... What's your reaction to it?