Sometimes our hands get dirty from touching things like dirt or food or even from sneezing and coughing. When our hands are dirty, they can have germs on them that can make us or other people sick if we touch our faces or share things with others. This is why it's important to wash our hands with soap and water to get rid of the germs and keep our hands clean. If we don't wash our hands, they can be considered "unclean" and can spread germs to other things and people, making them sick too. So, it's important to always try to keep our hands clean and wash them often!