I used to have to do cold therapy for an injury.
Leg submerged to above knee.
It was just as cold, gasp inducing, numbing, and freaking PAINFUL the 100th* time as it was the first.
*estimate... it was 5 times a week for several months. I don't know the exact number of exposures.
The warming up after ward did not feel "great". It was freaking miserable.