For the Love of Fanny(1931)

Glenn (Glenn Tryon), is trying to get into a secret fraternity in order to impress his girlfriend, Fanny (Helen Mann). But his rival is the president of the fraternity and has some very special plans for Glenn. The latter soon finds himself crooning a love song to two tough policeman. and being instructed to convince his blond sweet patootie, Fanny, that he prefers a brunette sweet patootie.