Tumblr is basically Hogwarts, you guys.
HP Fans will entertain every possible "what if" within the Harry Potter universe. In fact, they probably already have.
Via tumblr.com
They understand the importance of social hierarchy.
HP-inspired abstract art is a thing that exists.
They will pretty much inject Harry Potter wherever and whenever they can.
which is all the time.
Via tumblr.com
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21 Reasons "Harry Potter" Has The Most Dedicated Fandom Ever