I went to a boarding school in the 1960s. There was a reasonable amount of CP for that era. Some housemasters used the cane but not that frequently and generally for disobediance, such as being rude, lying, failing to do house jobs properly and other offences. These were given over the trousers at various times usually after breakfast. Sometimes one was caned at bedtime and this would be in ones pyjamas. Four strokes was normal. One master made you change into your games shorts and there was always a discussion as to whether one should wear underpants beneath the shorts or not! Most other CP was done by prefects who were allowed to use a hairbrush and this was principally for talking after lights out which resulted in four strokes in your pyjamas which was quite a painful experience. I received the hairbrush several times and the cane twice, once for lying and it taught me to be careful what I say to people!
After a few terms the headmaster changed and a much younger headmaster was appointed. He was much more concerned about discipline and used the cane quite frequently. He made boys drop their trousers and bend over when giving the cane which he was quite expert at. Four strokes in your pants was standard for offences such as smoking, talking to girls and other usual bad behaviour at a boarding school. Six would be given for the more serious matters particularly those that caused considerable trouble. Most boys said that either four or six was quite a painful experience.
He also introduced caning for poor work, this generally occured after a staff meeting during the middle of the term when work standards of each pupil were discussed. One term I was one of a number told to report to his study after morning classes. I was almost expecting to being caned in my pants and was almost looking forward to it! However, I was given a lecture about poor work and put on a work report scheme. Afterwards two other boys showed the results after being caned in their pants which were four red wheals.
Not being given the cane in my pants had a lasting effect on me and I really regretted that I had not received this type of caning. Consequently as an adult I have had to arrange to pay visits to have canings sometimes bare but often with pants or even navy gym knickers being worn. I must say that the headmaster's punishment or lack of it has been a lasting memory, but has given me an enjoyable adult pleasure.