Who is Jack? Jack is in your head Who is Jack? Jack is in your bed And Jack's been reading, Jack knows everything And Jack's been havin' little daydreams And Jack wants to keep your fingernails clean And Jack is sitting at your breakfast table Jack is all around But you, you can't see And Jack knows what you like And Jack knows what you hate And Jack gets jealous when you slip out on a date And Jack is sittin' at your breakfast table And Jack will see that you're all alone And Jack is sittin' at your breakfast table And Jack will see that you're all alone Who is Jack? He's all around But you can't see 'Cuz Jack protects you And Jack is the enemy Who is Jack? You're caught in his web Who is Jack? And Jack's been havin' little daydreams And Jack wants to keep your fingernails clean And Jack is sittin' at your breakfast table ♪ Who is Jack? Who is Jack? Who is Jack?