Two water signs read each other without words: intuition, emotional memory, an intimacy few bonds reach. You also catch each other's moods dangerously easily. Your work: don't drown together — someone has to remember to open the window.
Two mutable signs: infinite adaptation, mutating conversation, plans that change without drama. The hard part isn't getting along — it's deciding. This bond does well when someone says 'this, here, now' once in a while.