so wrote:
Ever need an extension cord at home and all you can find are the two-
prong type? (My wife seems to buy them in bulk). Why do they even make
a 2-prong type when all outlets are supposed to have a ground anyway?

I've told the wife to never buy a 2-prong extension cord.
Excellent advice.
When you've got a 3-prong appliance and only a 2-prong extension,
you're possibly at some risk. Better to have any one you grab have
the ground IF needed.