When you are nose to nose...

4 of my 11 cats love closeups with their meowmy. Everytime we are nose to nose I hold my breath. I consciously do it because blowing air at their faces is one of the methods I use to scold them when they misbehave.
Do you hold your breath when you get a nose kiss from your furbabies?

Not that I'm aware of! I'll check next time

No, I just breathe normally. For as long as Moose sits on me, I wouldn't be able to hold my breath that long!

My cats usually smell my breath, especially if I've eaten something interesting lately. So nope, I don't hold my breath. Besides, I'd probably pass out from lack of oxygen or something.

Same here.
If I've eat something that they like they want to smell my breath.
Gracie will actually take her little paw and try to pry my mouth open.
Of course I then start to laugh and end up with her paw in my mouth.

Elliott and Gracie sit on me for hours, I'd pass out from lack of oxygen if I held my breath that long.