Why does the yoga instructor keep reminding me to breath?

“Remember to breathe.”
I have never forgotten how to breathe in my life!
“Remember to breathe.”
Stretching, flexibility, and striking a pose that even remotely resembles the one she’s doing, I need help with, but breathing….I’ve always been good at that.
“Remember to breathe.”
Aw shaddup and help me untangle my legs!!!