I'm the same way with bleach when Fluffy uses it to clean the house. It just makes it really hard for me to breath and I usually flee the house. I know why, but it is remarkable how sensitive I am to it.

Breathing is an important thing. One good example is that it is really hard to get angry or upset if you take deep breaths. Not just shallow angry ones, but just long deep breath one. I suspect much of my mellow personality comes from that, but there are so many times when I start to get anxious about writing (you know, the "I suck as a writer" "why do you let me put down words") when a deep breath lets me calm down.