Some like it hot

I watched another sweet classic: Marilyn Monroe is half naive, half sensual, and half cunning. The two pals dressing up as women stick together through thick and thin and don't care much when Marilyn Monroe switches from one to the other. Arguing is their hobby anyway. The dressing up is completely unbelievable and I wonder: could they get away with it because people didn't look as closely back then or just the movies were more theatrical? Oh, and I fall for Billy Wilder slapstick dialogues and chases. But what I liked best was how the bass guy - who becomes the loved one of a millionaire - looks and laughs like my (female) literature professor. Could she be dressing up?