Irena the Serb's very glamorous Dejeuner sur l'herbe turns her amorous
When her mood gets erotic
Then she's brooding, psychotic
Brain disturbed, she goes furry and clamorous.
Simone Simon is the feline Irena Dubrovna in Cat People (Jacques Tourneur; 1942). Kent Smith is Oliver Reed, who falls for her. "Le déjeuner sur l'herbe" means "The luncheon on the grass", and is the title of an oil painting by Édouard Manet.