Answer

This sounds like a typical father talking to a rebellious teenage boy. He ‘rolled home’ showing a casual approach, a sense of him rolling in rather than walking in. His hair is ‘a mop’ metaphorically it appears messy and covers his face.

His father says ‘you’ve lost your head’ and is annoyed that he is ‘easily … led’ and almost challenges him to have the ring ‘through your nose instead’