The world's first human trial of a drug that can regenerate teeth will begin in a few months, less than a year on from news of its success in animals. This paves the way for the medicine to be commercially available as early as 2030.
"Spicy" isn't a taste, it's just a mildly painful chemical irritation. Spicy substances can hurt many sensitive body parts, including the mouth, nose, eyes, anus, and genitals. It's nothing to do with tastebuds, more to do with thin unprotected membranes in your body being sensitive to chemicals such as capsaicin or allyl isothiocyanate.