Why when things are coming to an end are they said to "PETER" out and not fred or arthur out and why when things are floating are they said to "BOB" up and down in the current and not jim or bill, are there any more like this I ask myself and does it really matter????
Yes it occurred to me just after posting the question that it seemed to be sexist as all the names seem to be of male origin, apart of course the contraption known as a spinning "JENNY"
To peter out and to bob appear to only coincidentally be the same as a man's name. "Jack it in" may not be, jack-of- all-trades is not coincidental, and "to jackknife" and "jackknife" for the noun are not, because Jack was a common name for a man, and a man would be associated with them. Where jack staff, jackstay and jackshaft fit in, I would not like to speculate :)