i dont think these little quips were ever meant to be taken seriously or as racist slurs.
im mid 40s and often remember my gran saying my mum had run away with a black man.
similarly if i asked where someone was the answer was
making a wigwam for ducks to dabble in
i really think these were affectionate sayings and not meant to cause offence.
maybe the ducks would be offended. who knows.
it was the same if you asked what was for tea.
answer was often shit with sugar on it.
i think these were just stock sayings of a certain generation
feel free to discuss and add your own!