Spock:  They remind me of the lilies of the field . They toil not , neither do they spin . But they seem to eat a great deal . I see no practical use for them .
Dr. McCoy: Does everything have to have a practical use for you ? They 're nice , they 're soft and they 're furry , and they make a pleasant sound .
Spock: So would an ermine violin , Doctor , but I see no advantage in having _ one _ .