Nipple Piercings

Hi girls! I'm 17 years old and I'm thinking about getting my nipples pierced. I only have my cartilage, ears, and belly pierced. I wanted to know if you girls could list the pros and cons to them. And how long the healing process is and how careful I have to be. Please please it will help me determine whether I want them or not. Please list the pros and cons thank you girls!