Is it itchy when you touch the taro plant without gloves?

Raw taro contains calcium oxalate crystals, which can cause irritation when they come in contact with skin. Basically, the crystals are like powdered glass, and they can cause tiny lacerations on your skin (or mouth, gullet, etc) which lead to inflammation and sensations of itching and burning. Cooking destroys the crystals, and it is best to use gloves when preparing taro.