The word "immoral" is normally used to describe persons or actions. In a broader sense it can be applied to groups or corporate bodies, beliefs, religions, and works of art. To say that some act is immoral is to say that violates some moral laws, norms or standards.
... May 11 - Salvador Dalí, artist
May 17 - Jean Gabin[?], actor (+ 1976)
May 21 - Fats Waller, pianist (+ 1943)
May 21 - Robert Montgomery, actor (+ 1981)
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