So THAT’S Why Your Nipples Get Hard When It’s Cold

Exposure to cold temperatures can affect the body in a number of ways, like making your teeth chatter or cheeks redden. But have you ever wondered why nippy weather perks up your nipples?

It’s not just a winter phenomenon — it can also happen in warmer times of year, like when the air conditioning is on full blast. So what exactly is occurring in the body when nipples become erect?