In the past, USPS used to mail humans, specifically children. https://www.google.com/amp/s/www.history.com/.amp/news/mailing-children-post-office https://www.g

In the past, USPS used to mail humans, specifically children. https://www.google.com/amp/s/www.history.com/.amp/news/mailing-children-post-office https://www.google.com/amp/s/www.history.com/.amp/news/maili... This was because there were not clear guidelines regarding what you could mail.