There's no perfect person in this world, either a perfect student with excellence academic and poor communication skill; or a perfect socializer who studies terribly.
The things are all balanced up, what goes around comes around.
As time passed, eventually we will know whom we can ONLY play and joke with,
and whom we can actually talk heart to heart with.
Certain people can't stand the critics we put on them and that's how things get screwed up. On that circumstance, we often turned hot tempered, shooting at each other, and the awkward moment when the next conversation we had is just like nothing had happened. This is the so-called jokes and random-chit-chat-mates.
The sympathetic thing that ever happened is, true friends are so hard to find and we should be very glad if we had a couple of them. These people we can talk and spit everything out at, express and preventing ourselves from turning into mentally distorted human.
Anyhow we can never escape from conflicts and frictions, even those true friends. Because we tend to talk so straight and direct way, and hurt the other party so easily by only words without realizing it.
Back to the topic, what goes around comes back around.
At that particular moment, often we can't stand something the other one said, and we tend to be ignorant and show that over-ridiculous-face showing, is your brain malfunctioned?
Then the atmosphere freeze and it stopped.
As a consequence, the next time the same thing will be reflected on yourself. When a conversation incautiously bent back to the previous 'sensitive' item, the character will be switching places and you will be facing that 'cute' face.
Why we as humans, must let this cycle happen sympathetically over again and again?
Because, we always wanted to win, and when we won the argument we lost another precious thing called, friendship.
How amazing? :)