A rather... prickly question!
To be honest, it's not possible for a human (or any living being) to literally become a pineapple. Pineapples are a type of tropical plant that grows on a stem and has a specific biological makeup that is quite different from ours.
But if you're asking in a more figurative sense, I suppose you could interpret "being a pineapple" as embracing the qualities that pineapples are known for, such as:
* Being sweet and juicy (having a positive attitude and being kind to others)
* Having a tough exterior but a soft interior (being resilient and strong on the outside,