What is the rest of this poem When it's hot he wants it cold when it's cold he wants it hot always wanting what is not?

This is a poem I vaguely remember from my childhood; well part of it anyway. I, too, was seeking the rest. It may be thus: "As a rule, man's a fool. When it's hot, he wants it cool. When it's cool, he wants it hot. Always wanting what is not." Thanks for jarring my memory!