Nature calls

Hi all.
Lately Recently, I found out that the meaning of "nature calls" is "go to the restroom".
It looks like the word  it is an old expression and the younger generation don't wouldn't say that.

There is a similar to the expression in Japanese. The word "お花畑に行く".
This The literal translation is "go to flower garden".

I think whether there are some similar words elsewhere.

Thanks to for reading.