Physical barrier to protect us from pathogens
Peer pressure can be positive if your friends are trying to convince you not to do something dangerous or bad. Peer pressure can also be negative because in a lot of cases your friends may try to pressure you to do something bad like, sneak out or drink. It's important to resist some types of peer pressure because those around you who are pressuring you may not be concerned about your safety or the consequences and are just looking to have fun. It's important to resist it though because at the end of the day you should always be looking out for yourself, so do what is best for you, not to impress others.
