What does the sofa mean in a blog message?

Here's where the sofa came from:

It is said that the word sofa first appeared in an adult forum, basically the origin of the sofa is: someone posted a picture of a beautiful woman, and the person who replied to the post said that it was good to be punctual, and he wanted to sit on the sofa and jerk off. Then, all those who sent good pictures and got support said to sit on the sofa.

Later, many high-minded people didn't understand the word sofa and then thought that the sofa referred to the person who was the first to reply to the post, and now many people say that the first reply is the sofa, really. Go to the sofa when you read an anti-Japanese post, and sit on the sofa when you read a political post, you are really energetic. Hats off to so many people who are always on the couch!

Truth be told, this explanation makes a lot of sense. It can also be verified, in the past, there were several adult forums on the Internet, which were more popular, and there were more people living there, and there were more words.

But I also saw an explanation that was: "A group of people are looking at the post, and suddenly a very new resource comes out, and the first one to reply to the post sighs: so fast, and then all the new resources have people go up to sigh so fast...

The sofa is a homonym for so fast, and then it has been handed down. ”

Either way, the term has been abused on the forum now, and it has also become a way to irritate the water, and it is estimated that the forum will also ban the word in the future. A netizen on a forum said: "Too much use is simply overflowing, and it also indirectly leads to a sharp decline in the quality of post replies."

This vulgar thing simply reminds me of Brother Daolang's first snow! "And now it has also been extended that the third floor is to sit on the bench, which is easy to explain with the first statement, if you can't grab the sofa to sit on, the bench will also be settled. If the second argument is used, it will not explain what the bench is at all?

So if you do this, where does the fourth floor sit on the floor, the fifth floor on the basement, and the sixth floor?