@TheAstroChuck Thank you.

Those that were not known to be heavy drinkers tended to suffer reduced mobility, which appears to confirm this hypothesis.

Agree...spontaneous combustion of materials definitely factual, spontaneous human combustion unlikely. Significantly no one has ever witnessed a spontaneous human combustion.

@Marionville It's known to affect bulk-stored pistachios, apparently. I eat a lot of pistachios...!

@Jnei I worked for an International charity and we sometimes stored huge piles of collected bags of clothing....there was once an incidence of spontaneous combustion in one of the warehouses.

@Jnei You will need to watch out then! ?

I realise certain materials can self combust such as hay or straw stored when damp. I was referring to human spontaneous combustion.
There were a couple of cases of a completely burned out body found in a poorly ventilated room with fat deposits on windows. One theory was that the clothing of the person caught alight from a source such as a gas fire or cigarette. The fire then melted the subcutaneous fat of the body which soaked into the clothing and this then burned more of the body and so on in the low oxygen environment.
Of course it should not be called spontaneous combustion as there was an original heat source.

I agree that it is very unlikely but I would not discount it entirely

@Moravian I assumed you were. The process you describe in known as wicking, incidentally - interestingly, the hands and feet which both have much less fat than other parts of the body tend to be left unburned. In my opinion, there's probably very little reason to think SHC is a real phenomenon but as cases are very rare there's not a great deal of data and as a result it's not been possible to entirely refute it.