We have a ritual Christmas tree burning every new year along with any of my books more than 7 years old. I have to say, those dry pine needles do burn furiously.
I found 4 old porn mags under the loft insulation in my house. We moved in in 1990 and these are dated in the 70’s so I can imagine a previous owner popping up the loft for some me time.
Since 1982, my wife and I take it in turns to go around the house twice daily soaking anything that happens to be dry to prevent any such things randomly combusting.