Pineapple hits with a one-two punch. Raphides, sharp microscopic crystals of calcium oxilate, scratch the mouth, causing micro-abrasions, while Bromelain breaks down the proteins of the mucus lining the cheeks and tongue. Together they allow the acid of the pineapple to more effectively attack the mouth, giving that traditional stinging sensation.
I dunno, kinda sounds like both of you are mildly allergic to pineapple
Pineapple hits with a one-two punch. Raphides, sharp microscopic crystals of calcium oxilate, scratch the mouth, causing micro-abrasions, while Bromelain breaks down the proteins of the mucus lining the cheeks and tongue. Together they allow the acid of the pineapple to more effectively attack the mouth, giving that traditional stinging sensation.