Could Ainur reproduce?

[Annunfuiniel]

Hmm, I wonder what'll be the faith of this thread... [img]smilies/wink.gif[/img] But I think an answer can be given to your question about the reproduction of the Ainur.
In the Book of Lost Tales (eg. in The Music of the Ainur and The Coming of the Valar chapters) there indeed appear children of the Ainur:

With him[Manwë] was Varda the Beautiful, and she became his spouse and is Queen of the Stars, and their children were Fionwë-Úrion and Erinti most lovely.

But in the Commentary on the Music of the Ainur CT writes:

Erinti later became Ilmarë 'hand-maid of Varda'[...]. Fionwë, his name long afterwards changed to Ëonwë, endured to become the Herald of Manwë, when the idea of 'the Children of the Valar' was abandoned.

(bold is my amendment)
Hope that helps, Noxomanus. [img]smilies/smile.gif[/img]