Am I the only one in the world...

so you're covered.

When I was little I had a fly go in my mouth when I yawned on my great aunt’s front porch! Freaked me totally out. I’ve covered a yawn ever since. HA!

I’ve been a “gesundheit”er all my life, but can’t recall saying it to myself. (I scared my sleeping cat curled up on my lap once with a hellacious sneeze, she flew up in the air and hit my chin and I said “gawddammit!!!”...does that count for anything?)
Hehheh.

I also say excuse me when I burp even when I am alone.

However, saying "gesundheit" when sneezing alone is probably a sign of a deep-seated neurosis since I don't do that, and I'm the standard of mental health and normal behaviour.

I'm eccentric, but other people are weird.

There's no covering that up lol

I backed up the dictation and listened again and didn't hear anyone say "bless you" on the tape, so it sounded like a response to me.

A transcriptionist sister! I did med. transcription for years....back in the day.

I know I have absolute OCD about saying "gesundheit" or "bless you." I will say it to complete strangers and I get ruffled if I sneeze and I don't hear one back. It's crazy, especially the "bless you's" because I'm not even remotely religious.