bug#27942: Bug regarding "touch" command

[L A Walsh]

Paul Eggert wrote:
> pavan kumar yalavarthi wrote:
> > " *touch  -* " is not working i.e., file named " - " is not being 
> > created
>
> It's not a bug. In coreutils, 'touch -' is documented to touch the 
> standard output file, not a file named '-'. The POSIX specification 
> for 'touch' allows either the coreutils behavior or the other

Thought it was a bit humorous, the bit about touching ... "stdout"?
or...  as in "/dev/stdout"?   Definitely not in my man page for touch,
new change?  I do see it in "touch --help", so seems relatively new.

What is touched ?  /dev/stdout? 

"Touching the 'file' associated with stdout"? 

How would I (or someone) use it?  Was/is there a use case
that supported or needed the new feature?

Curious: partially because I was/am amused and see no clue as to how
to use such a feature.