Never swat a fly, he may love another fly He may sit with her and sigh the way I do with you Never harm a flea, he may have a favourite she That he bounces on his knee the way I do with you Never stop a moth when he is gliding through the air He may have a date in someone's flannel underware Ah ah be carefull Never spray a nit with a great big can of blitz He may think some nit has it the way I do with you