I am a huge lover of Pineapple, it is one of my most favourite fruits in the world. I was looking on google why whenever I eat pineapple (a lot of it) my tongue hurts and I came across this gem of a website, which I enjoyed reading and well quite frankly it was informative about Pineapples! Check it out
https://blogs.unimelb.edu.au/sciencecommunication/2012/10/07/the-flesh-eating-pineapple/
https://blogs.unimelb.edu.au/sciencecommunication/2012/10/07/the-flesh-eating-pineapple/