Body piercing is when a hole is made in your body so you can add a piece of jewelry for decoration. The earlobe is the most common body piercing. Some people also pierce their ear cartilage (the hard part of the outer ear). Other places to pierce include the eyebrow, nose, tongue, lip, belly button, nipples, and genitals. A single-use, sterilized piercing gun is typically used to insert an earring into the earlobe. For other parts of the body, a hollow needle is used to pierce a hole in the skin. The person doing the piercing will insert a piece of jewelry into the hole.