Please, please do go read this timely essay at the National Review. It's a subject very dear to our hearts here at the Beehive.
Go on, we'll wait.
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Now then, start life over with better rules. Surprise your friends and neighbors by singing at odd moments. We do, always have, and we can reassure you up front that it's usually a good thing. It's cheerful and affirming and diverting and... normal. Not average, mind you, not anymore... but it IS normal. The rest of the world may have waxed abnormal in this regard, but that doesn't mean we have to.
Singing makes the world a better place.