FWIW, Utah is not alone in having obsolete law still in play- for example, Illinois state law says that a female companion shall call her date "master" in public unless they are married (at which point she can call him whatever charming epithet springs to mind?) ;-) while in Vermont a wife needs her husband's permission to wear false teeth and in Arkansas it remains illegal to beat your wife more than once a month. Also there are state laws against crossing a State line with a duck on your head or allowing a donkey to sleep in your bathtub. In Hawaii, it remains illegal to stick coins in your ears. We may think the public is a bit thick today, but the prevalence of such laws makes it obvious that idiots have been around forever. ;-)
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1