Matthew's nickname for Gilbert is Pooh bear, and Gilbert hates it.
It actually originated when Matthew was tired of Gilbert calling him Birdie, took a look at his bookshelf and saw a copy of the Winnie the Pooh books, and shouted- "Pooh bear!"
It has stuck ever since, and why Gilbert hates it so much is because he likes the dam books and acts like the bear too.
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Hetalia Headcanons created from my brain.
FanfictionI have seen many books of this & I've seen many repeated many, many times; so I decided to give a crack about creating headcanons. PLEASE TELL ME OF ANY SHIPS I HAVE NOT COVERED B/C EVERY SHIP IS WELCOMED HERE