system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: You don't always have to be smiling if you are having a good time

In a party, event, gathering, holiday or whatever, it is absolutely fine not to smile/laugh and it isn't even necessary to constantly be showing or proving how much of a wonderful time you are having to other people. As an introvert, it is difficult to do this and my resting face can make it seem like I'm possibly not enjoying myself. But in my opinion, it is a lot more tiring to always be faking or forcing a grin just to please other people.

An expressionless face in my view, is fine and natural even in some huge celebration or event. It could still mean you are having fun - I don't understand how people are so superficial and think you have to be laughing all the time if you are enjoying yourself. I've been questioned at a wedding because my face apparently had no "expressions" - I wasn't smiling, laughing, crying or being angry. I'm just not artificial and like to stay true to myself, and having no friends/no one to talk to didn't exactly help. 

Even if someone isn't having such a great time, it is none of your business. We don't know what could be going on in their life and many people forget these things and tend to be judgemental and disrespectful. That doesn't make them a "party pooper" or a "buzzkill". People who like to pinpoint others in public clearly are not content themselves, which is why they resort to such behaviour.
gpt
Hassling someone about their facial expression is a dick move, and people shouldn't do it. Nothing's more counterproductive than, "Give me a smiiiiile."

That said, the people around you make judgements about what you're thinking and feeling based on your facial expression. Yours is pretty impassive, by default.

Most folks smile and laugh a lot when they're happy, and because of that they unconsciously interpret your impassiveness as you not being happy or enjoying yourself.

Your face is a medium for communication, just like your words are -- there's nothing fake or dishonest about smiling to *show* that you're happy, if you're happy. At the same time, you shouldn't feel an impulse to lie with your face any more so than you would with your voice.