Possible Clues:

• The first thing you learn is to have fewer things on
• That's th first thing you have to learn to have as a nudist
• Not so much upon you to start school
• The first thing a nudist has to learn to have
• That's the first thing a stripper has to learn
• First chapter in a primer
• Learn at first to be nearer to being in the nude
• Learn at first that this is not even a single, by the sound of it
• Not so much on a single, by the sound of it, starting in school
• Start of an instructional series