Yes, this was an inappropriate post that has no place here. I'm sorry to the parent poster and anyone whose enjoyment of the joke is blunted by this. I certainly didn't intend to be an insulting downer but I certainly don't expect anyone to read it as anything but intending to insult. I apologise.
The first hadn't heard from the others but wants a beer so can't deny the universal.
The second hadn't heard the last but wants a beer so can't deny the universal.
Neither the first or second could deny the universal so therefore they want beer and so does the last so that one can reply yes.
/Sigh, I explained it.
[Edit: and then noticed three others had already but I was too incensed to read beyond the ask. /Sigh]