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Deleted member 174758
I remember my old man telling me that was how inmates used to spread butter - he was a psychiatric nurse and the immates of the hospital he worked at weren't allowed access to knivesAnd in a work canteen about 25 years ago, a sandwich maker used the back of a spoon to spread the butter - incredibly fast, probably about a second to cover 2 slices of bread.
When I started work in the days (just) before microwave ovens, some of the lads used to heat up pies at lunch time using the RF (radio frequency) glue curer.