FWIW, my dad had a pink dress shirt in the mid '50's; he wore it to church with a suit and tie, while sporting a mustache.
He wasn't a fashion conscious guy by any means. My mother must have purchased the shirt......which would indicate it was being sold
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As a child I didn't give it a second thought___________until the uproar in the late '60's and early '70's requiring men to wear white shirts only