I went to a prestigious (read pretentious, think English public school) private school in NZ, and corporal punishment was very real in 60's & 70's.
I got caned so many times I can't remember, of course it hurt, but not a single phoque was given. In those days sanctioned corporal punishment was administered by the Prefects, I got a few of them too. The severity was graduated 1, 2, 3, 4 or 6 strokes of the cane, it was cane of about half an inch diameter. For some reason I have no recollection of anyone ever getting 5 strokes. Some practitioners could draw blood on occasions. Chamois leather inside the pants helped soften the blows but you had to know in advance that you were getting a caning.