"America, do you know what the temperature is outside?" Italy asked America during one of the world meetings.
"It's about 80 degrees." America said glancing at his phone.
"WHAT?!" Italy shrieked, making America jump in his seat. "WE'RE GOING TO DIE! GERMANY, HEEEELPPP! THE WORLD IS ENDING!"
"AMERICA, WHAT DID YOU SAY TO ITALY?" Germany yelled angrily as Italy clung on to him crying.
"YOU BASTARD! IF YOU THREATENED MY BROTHER I'LL STAB YOU IN THE CHEST WITH A SPATULA!" Romano said as he grabbed the front of America's suit.
"What, no!" America said franticly as the other countries started to throw evil looks at him. "All I did was tell him the temperature outside. I swear!"
"Did you tell him in Fahrenheit, or Celsius?" Canada asked with a sigh.
"I told him in, oh." America said realizing what he had done.
"WHAT DO YOU MEAN, OH?" Romano said glowering at America.
"If you would be so kind as to let me go, I would be happy to tell you." America said with a nervous grin. Romano gave him one more threatening look and let go. Sighing with relief, America walked over to Italy and gave him an apologetic look.
"Um Italy, the world isn't ending." America said.
"Huh?" Italy said with a confused look on his face. "But you just said-"
"I forgot to convert from Fahrenheit to Celsius." America said. "What I should have said was it was about 26 degrees outside."
"Oh, I get it." Italy said happily. "Whew, I thought we were all going to die. I'm glad we're not."
"America, why don't you use Celsius like the rest of the civilized world?" England asked rolling his eyes. "You could avoid causing situations like this if you did."
"Well, let me explain why I like my way better." America said walking up to the black board. He drew two thermometers. Both were tabled from zero to one hundred.
"With Fahrenheit, zero means it is freezing cold outside." America said pointing an arrow at the zero marker. "Each time you go up a degree it gets a little warmer. By the time you reach 100 degrees, you know that it's very hot outside. So by using this method, you have a neat scale from zero to 100 to measure temperature the by. For example, zero is below freezing. 10 degrees is a little warmer, but still below freezing. It gets warmer until it reaches 32 degrees, or the freezing point of water. Then it continues to get gradually warmer every 10 degrees."
"So you go by a 10 point system?" Italy asked.
"Yes and no." America said. "The main difference between Fahrenheit and Celsius is that in Celsius, zero is the freezing point of water while 100 degrees is the boiling point of water. Fahrenheit is used to express how cold a person is feeling outside."
"It still makes no sense to me." England said.
"Well, I tried." America said with a shrug.
A/N: Well, I hope I didn't confuse anyone with this. Celsius is favored because it is easier to remember where the freezing and boiling points are. However, a significant number of countries still operate on the Fahrenheit system for many applications, such as weather information and cooking.