You unblocked me an ancient memory, That's something I used to do all the time when I was a toddler and my parents let me be in their bed.

I don't, but it's fine to hear your cat breathing. It doesn't necessarily mean there is something wrong with the cat, though, I'm not stopping you from a vets checkup if you think their breathing is too loud.

What surprised me was that you were trying to sync to a cat, that's not easy. Even when sleeping, cats breathe much faster.

This is the first time I am reading about something like this. Very interesting.

Yes, I've caught myself doing the same every now and than.

Sometimes when my partner is stressed, just being close and me breathing calmly is enough to instill some calm into their breathing and eventually calm them.
I've had that happen the other way around and it's actually nice and soothing.
Until you unsync and need to reboot the breathing software for a sec.

Doesn’t a cat breathe really fast? I can’t imagine trying to keep up with that. Similarly, I caught myself synching to 1/2 my ex’s breathing, because our rates were naturally too far apart

I can't hear well enough to do this. Even if I turned off the fan that drowns out the tinnitus, I wouldn't be able to hear my wife breathing like that o_o