Tolkien=Matchmaker?

[Lalaith]

I really don't think elves married for expedience, or that their parents would encourage such an arrangement. Remember, elvish unions last for eternity and are not dissolved, so marriage was not entered into lightly!
For further information on what Tolkien thought of Elvish marriage, I recommend following the link posted by the Elf Herself in the Elvish Reproduction thread. It should answer your questions.