Why is it called eau de toilette?

Why is it called eau de toilette?
Eau de toilette (French: [o d(ə) twalɛt]) literally translated as toilet water (but more appropriately described as "grooming water") is a lightly scented cologne used as a skin freshener. It is also referred to as "aromatic waters" and has a high alcohol content.

Reference:
Eau de toilette - Wikipedia
Aug 3, 2019

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