Always blue?
Some of it will probably be about how many dermal layers you have, me being peely-wally coloured will have fewer dermal layers, (thinnier skin) maybe as few as 4 or 5 than someone with dark skin, maybe as many as 10 or 12.
I am from Irish origins (going back a few generations) and am very fair skinned so burn very easily and I tend to avoid sunbathing. This leaves my skin quite white and a bit thin (you can see my veins through my arms now I have lost a bit of weight).
I have a healthy, balanced diet so I think the skin regenerates fast - plenty of protein and fats in the diet seem good for this.
Back in the UK I used to find I would get dry, flaky skin especially in the winter due to the very dry environment indoors. I now drink plenty of water and with the diet my skin has never been healthier.
You're lucky not to have problems, medicated body washes can be worse for the skin than ordinary ones.
Some of it will probably be about how many dermal layers you have, me being peely-wally coloured will have fewer dermal layers, (thinnier skin) maybe as few as 4 or 5 than someone with dark skin, maybe as many as 10 or 12.
If I showered 3 times a day I don't think I'd have any skin left
Is washing that often good for your skin health though?
I have had no problem and I've been using this routine for 3 years now.
I use a moisturising body wash so that probably helps - no need for shampoo as I'm bald up top and the one product covers all areas.
No dry skin, no itchiness or any other issues thank goodness.
People who do have skin issues just use a medicated body wash from those I know of but that is a limited sample size.
Makes sense if you wear a lot of dark colours, but most of our tumble dryer fluff is white.
Ah, that makes sense! I am just from cold and wet North Devon 
. Yes, public transport is awful from that POV. My dentist would love Brazilians.
Is washing that often good for your skin health though? We have whats called an acid mantle which is made up of sebacious secretions, sweat to keep our skin healthy, human skin should be 4.4-5.5, so slightly acidic, it acts as a mild disinfectant. If you disturb the acid mantle it can cause not just infections, but skin conditions such as exczema.
I not advocaing poor hygene either, I'm not a fan of stinky people either.
It seems a design flaw to me
I would agree. Some humans have belly buttons that stick out but mammals such as the mountain gorilla have just a slight indentation that marks where the umbilical cord had been. Marsupials don’t have belly buttons because the cord breaks off when they are still in the pouch and they are underdeveloped.
My former husband used to and he had hair surrounding his belly button.
I have a hairy chest / belly and the hairs actually spiral around the belly button. It acts as a vortex of a kind and I notice that when I wear soft cotton tops that the material is almost scraped by the hairs and releases fluff that slowly migrates towards the belly button.
When I wear a less soft material (eg gym t-shirt) then there is no fluff to release and I don't get any build up.
It seems a design flaw to me - the belly button is a bit of a vulnerable area for infection to enter the body and it acts as a trash collecter for the belly area. It work this way with both a bit of a pot belly and also with a six pack.
I don’t get belly fluff. I had always thought it was just because of the type of clothing next to my skin and because I shower regularly.
My former husband used to and he had hair surrounding his belly button. I used to marvel at this phenomenon.
Surely the shape of a belly button has some influence on fluff collection.
That seems an awful lot.
It is over 30C here during the day and I go to the gym twice many days plus often do manual labour on renovation projects so there is lots of sweating and dust so it is merited.
Brazil also has a high standard for personal hygiene in gerneral with most people brushing their teeth after every meal and wheb they wake up and go to bed.
After the UK it was so nice to be away from so many stinky people that I used to come across on public transport.
I shower about 3 times a day
That seems an awful lot. But nice if you are getting into crisp, freshly washed sheets, especially Egyptian cotton.
Don't get fluff as my fat covers the gap 
. It's a useful area to put salt if you're eating in bed.
Mine reflects the color of fabric I wear as a t-shirt or shirt but I shower about 3 times a day and this gives little opportunity for bacteria or mould to grow and change this.
The BBC did a bit of research on this very subject: https://www.bbc.com/future/article/20150709-the-curious-truth-about-belly-button-fluff
