Imagine a room where 100 people are talking at once.
And all of these people expect you to hear everything they say.
And you expect everyone to hear all that you say.
If you blink for a moment, if your mind fades, if you focus elsewhere for the smallest amount of time, you miss what others expect you to have heard, because they said it.
So, imagine such a place. Then know that what you have imagined already exists. They call it Facebook.