The longer you are with your partner the more predictable they become. Whether it's what they say or their mannerisms, it gets easier to pre-empt when they are doing to do or say something.
And it's hilarious!
It's not a conscious decision, but continuous time in each other's company can also mean that you start to imitate one another too.
These couples take the risk and try to act like their partner in extreme situations. From dancing to fighting- judging by the reactions- these couples are on point with their impressions!