Why did people eat bunches of herbs while outside during the middle ages?

During the Middle Ages, people often ate bunches of herbs while outside as a form of protection against bad smells and potential diseases, which were thought to be spread through "miasmas" or foul air. Herbs such as rosemary, mint, and thyme were believed to have purifying properties, and their strong scents helped mask unpleasant odors in urban areas. Additionally, herbs were used to enhance the flavor of food, and many were valued for their medicinal properties, making them a practical choice for those spending time outdoors.