Trivia Time with Pineapples!

Answer the following questions correctly, or forever be known as a Cretin of the Fruit World

1. What is the average lifespan of a pineapple in days?
2. What is the primary use of a pineapple's tough, waxy stuff on the outside?
3. What is the name of the famous pineapple enthusiast who wrote the definitive book on pineapples?

Good luck, and may the pineapple gods be with you!