Or I find the right words, but they come all at once and in the wrong order, and there's just so many of them, and it's very important that I get them exactly right, and... yeah I'm just going to not bother.
And then a few hours later I realize that it was a work email and I probably should get back to that.
It would being nothing to the conversation, or I don't find the right words for explain my ideas correctly.
Or I realize halfway through that I'm being a bit of a dick and decide the world doesn't need more shittiness so I just delete the comment.
Or I realize that the message I start to reply to is hostile and not worth engaging with.
This too.
Or I find the right words, but they come all at once and in the wrong order, and there's just so many of them, and it's very important that I get them exactly right, and... yeah I'm just going to not bother.
And then a few hours later I realize that it was a work email and I probably should get back to that.
Ouch. Important mails, I succeed to do them well.