[TOMT] [INTERNET POST] Tumblr post about staying up on social media after saying goodnight

I saw a Tumblr post a while ago talking about when two people are chatting and they say good night, and then one sees the other one still on social media. It was about how it was okay to say good night and then just chill for a while and unwind. Anybody know the post I'm talking about? Trying to explain this concept to my girlfriend.