Joyce’s doctor advised her to stay off dairy. She stayed off cheese and milk but as she loves butter she expeditiously declared butter a ‘non-dairy’ product:
Her bright new world discounts science
as too stodgy a reliance
With single-mindedness utter
Joyce declares it non-dairy
and goes on indulging butter
Handy to let facts vary
Thanks, Non-Dairy Cow
all much butter now!