Very handy for bad hair days, spot on forehead days and can't be fagged to put make up on to pop to the shop days.
Seriously though, whatever next? Any garment that covers the whole face is intimidating to people. These things will be meat and potatoes to criminals who want to evade cctv.

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Old aunts used to come up to me at weddings, poking me in the ribs, cackling and telling me
'You'll be next.' They stopped when I started doing the same to them at funerals.