What an... interesting 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 grow on trees and have a specific biological makeup that is quite different from ours.
But if you're asking in a more metaphorical or humorous sense, I'd say being a pineapple could mean embracing some of the fruit's unique qualities, such as:
1. Being prickly on the outside but sweet on the inside (i.e., having a tough exterior but a kind heart).
2. Being a bit quirky and standing out from the crowd (