"A roving reporter from the" joke

A roving reporter from the BBC was touring a remote part of the
Scottish Highlands looking for material for a documentary about
the way of life there.
REPORTER:
Hello there, excuse me, I'm from the BBC and I'm gathering
material for a documentary about the way of life in the
remote parts of the Scottish Highlands. You look like an
interesting fellow, perhaps I could interview you?
SCOTSMAN:
Certainly...
REPORTER:
Well, perhaps you could start by telling me your name?
SCOTSMAN:
Well now there's a story. Y'know I deliver the mail round
here, but do they call me Donald the Postman? No they don't.
You see those fine crofts up on the hill there, well, I built
more than half of them myself, but do they call me Donald
the Croftbuilder? No, they don't.
And did you pass the nets down in the harbour? Well, I made
several of them, but do they call me Donald the Netmaker? No,
they don't.
But, I tell you, a moment's weakness with just ONE sheep....