Adaptation and Identity Crisis
As time passes, something interesting happens - we start to forget our origins and adapt to new surroundings. Duffy shifts to second person narrative ("you") to make readers reflect on their own experiences of change.
The image of the brother swallowing a slug shows how quickly children can adapt to fit in with local customs, even when they seem strange or unpleasant. Meanwhile, the speaker describes her tongue shedding its skin like a snake - a powerful metaphor for losing her Scottish accent and, with it, part of her original identity.
The devastating list "I lost a river, culture, speech, sense of first space and the right place" captures the profound sense of loss that comes with cultural displacement. These aren't just minor changes - they're the fundamental building blocks of who we are.
Remember: The final question "And where do you come from? Originally?" shows how complex identity becomes when you've lived in multiple places - sometimes there isn't a simple answer.