Bad boys get bottom marks - or do they?

Having had a fascination with spanking and bare bottoms from a very early age, at the age of 21 I took the brave step of placing an advert in a contact magazine offering myself to older men for spanking and sex. It was before the days of the Internet and to be discrete and prevent anyone finding out I needed to pay for the advert with a Postal Order and had to pay for an accommodation address where I could have any replies forwarded to me. When I look back it was so difficult to hook up compared to today and I am surprised that anyone managed to meet at all!
I received a reply from a guy (an actor who often appeared on televison) in his early 50's who lived by himself in London and who described himself as a spanking expert. After plucking up a lot of courage I went to see him and must admit to having second thoughts when I saw his impliments laid out and ready to make their mark on my bottom. He definately was an expert both in boys bottoms and spanking/cp and knew how to punish and pleasure them. To this day I have not really met anyone who has been such a genuine bottom lover and expert in using them.

He liked to spank boys naked so after he inspected me in my underwear I stripped and went over his knee for a lengthy firm OTK bare bottom spanking. He then put me in other positons and proceeded to use the strap and paddle before finishing off with a few medium strokes of the cane. Like any good spanker he read how the pain was accumulating and took time to caress and soothe my bottom as and when necessary. It was a good session and over many years I would see him regularly for the same treatment with a few variations such as wearing spanking pants, thongs, jocks for him to enjoy and sometimes video'ing me being punished for his collection.

We became friends and he explained over time that he used to be an avid and active bottom and only really started to Top in recent years. As a result, on a few occasions he would ask me to spank and cane him which I willing agreed to do. He liked a hard firm spanking and took a lot of very hard strokes of the cane (certainly harder than I could take at the time) and received them like a man. What surprised me was that no matter how hard I spanked or caned him his bottom would show no sign of stripes or reddening. Initially I thought that maybe I wasn't laying the strokes on hard enough but no matter how hard or how many strokes I added I could only ever get his bottom to show a very slight pink tinge. I asked him about it and he explained that he used to redden like anyone else but it had decreased over many many years of extensive hard punishment on his bare bottom.

I wonder if any readers have had the same experience (or maybe their own bottom is the same) and can throw any light on it. I can only assume that the capilleries in the bottom have been damaged after years after punishment but is that the cause and if so, does it cause any problems?