User blog comment:Pinguinus/Fan Theory on the Face of Boe/@comment-27270572-20151102000743/@comment-3538016-20151102002118

Thanks!

I like that theory, myself, though I'd caution that practically anything could have happened over the course of five billion years to poor old Jack. While the Headless Monk theory definitely fits, Jack's disembodied state could simply be a result of his aging over many billions of years.

Here's a thought: maybe the Face of Boe's body (or lack thereof) is related to his telepathic abilities. Perhaps over millions of years his brain developed the power of telepathy or even telekinesis, and his body became vestigial as a consequence. Like the tail that humanity evolved past, Jack's body became useless and eventually disappeared altogether.