Before the strict film codes in the movies (like the rule that a ladies foot must be on the floor when kissing a gentleman, no hanky-panky on the bed) Claudette Colbert starred in Cecil B. DeMille's picture "Sign of the Cross". She floats around in her tub of milk with enough cleavage to make Howard Hughes jealous. Here she is bathing in donkey's milk (since when is scrubbing with donkey's milk considered elite?) which wasn't really donkey's milk but powdered milk that got so hot under the studio lights that it started to curdle.
Wasn't that a fun day to be on set!