dinosaurs and old age

So, we’re going to the zoo for Lola’s birthday and she wanted to know if there would be dinosaurs there. So I explained, as best I could in terms a newly-four-year-old might understand, the current absence of dinosaurs. Which led to a discussion of what we would do if a planet hit us now (“would they put us in a museum?” and “would they take our skin off first?”). Which led to death in general and how all people die eventually — of old age if nothing gets them sooner. Which led Lola to surmise that I might die soon as:

“You’re getting old ‘cos your foots are all rusty.”