1. We share a wardrobe of hip, androgynous clothing
    Even though we are different sizes, all articles magically fit both of us, sisterhood of traveling pants style
  2. We already have all the same friends, yet somehow hadn't crossed paths before, so we don't have to undergo the arduous task of integrating a new love interest into one's social sphere
  3. Exact same sex drive
  4. Lots of written correspondence
  5. Possess identical philosophies about social media etiquette
  6. Nearly unbearable pain from incessant laughter
  7. Same taste in brunch spots, films, and mattresses
  8. There is always a fail-safe way out of it