It is a euphemism that I associate with AmE rather than BrE.Comfort break is a euphemism for a visit to the toilet.
I've never heard this used in AmE. Many years ago, at the Bronx Zoo, there were directional signs pointing to the "Comfort Stations." I don't know if they still use that term, but this is the only time that I've seen "comfort" used in this context.It is a euphemism that I associate with AmE rather than BrE.
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