In reference to fact 2, ‘Simon Tatham Has No Sense Of Smell’ FAQ¹ always struck me as interesting. Even just for the obvious things like being wary of gas appliances, somehow such a thing had never occurred to me.

[There are plenty of other cool things on his site beyond just the puzzle collection and putty.]

1. https://www.chiark.greenend.org.uk/~sgtatham/smell.html