Originally Posted by dave1976:
“That would make terrific sense.
I think this could have been answered in 30 seconds, had Amy asked why such such things were attached, with the Doctor quickly explaining that it portrays parts of his personality.”
Does it really need explaining though? It's the kind of thing that younger viewers won't give a second thought (other than maybe asking Daddy why that computuer keyboard has little hammers attatched to it

), while people like you and me, who remember what a typewriter is, are old and sad enough to give these things some thought and come to our own conclusion.
It's the old Lost connundrum, personally I like a few things to be left to the viewers imagination, other like some clarity in the writing.
Phillip Pullman sums this up nicely for me on his website:
Quote:
“As a passionate believer in the democracy of reading, I don't think it's the task of the author of a book to tell the reader what it means.
The meaning of a story emerges in the meeting between the words on the page and the thoughts in the reader's mind. So when people ask me what I meant by this story, or what was the message I was trying to convey in that one, I have to explain that I'm not going to explain.”
OK, he's talking about books, but the principle stands.