You know when you meet someone new at a party and somehow you just 'hit it off' straight away?
Everything you say is agreed by the other person, they are a really good listener, and you can sit back and listen to them all day too.
There is a perfect relationship there. Sure you might be concerned that you may fall out later, but for now everything is cool.
Fast forward a year or two of casual frendship and you realise you have a rock solid pal. Everyone you know tells you that they 'love' that person too, and no body has anything bad to say about them. Welcome to my best freind in the full stack. Redis.