I think that's the only way I've actually ever heard it used. But your next sentence would more appropriate as 'I need to use the bathroom'.
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CliveHi,
I think the idea is just that our bodily needs are a natural function. 'Call' has the sense that these functions can not be ignored.
It's a mildly humorous cliche. In a less informal situation, you'd probably say something like 'Please excuse me for a moment' or 'I have to go to the bathroom'. As the formality increases, the direct references d
Clive The man/dog thing is very British, I think.I've heard it all my life: Colorado as a youth, Washington state as an adult: total of 61 years.