Sometimes I think I don't know what I'm doing, But I always end up doing what I know, Sometimes I think I don't know what I'm doing, But I always end up doing what I know, And It's amazing when you think of it, How many people smoke, Despite the risks that are involved, There's really very little hope, - Without them we just couldn't cope, Couldn't cope, neither could we Sometimes I think I don't know what I'm doing, But I always end up doing what I know, Doing what I know, doing what I know Sometimes I think I don't know what I'm doing, But I always end up doing what I know, Sometimes I think I don't know what I'm doing, But I always end up doing what I know, Have you ever wondered, What would happen in a third world war, No sooner would it have begun, Than it would be all over, Just look over your shoulder, your shoulder, It's above your knees Sometimes I think I don't know what I'm doing, But I always end up doing what I know, And what I know, may not I know be a great deal, But what I know nobody can take