If your pineapple smells like chemicals or fermentation, it means it's already fermenting. If it has reached that point, it may smell like alcohol or vinegar. However, if the pineapple is still green and not yet ripe, it will not have an alcoholic or vinegary flavor. In order to make pineapples alcoholic, you would have to add sugar to them. This would result in them tasting very sweet with a slight acidic note. Alcohol can cause your pineapple to turn an unappetizing brown color, so be careful not to let it get too drunk!