I was thinking about their choice this same day! Great minds think alike
I really wonder if there are some things that could invalidate such a choice; can you claim that you were drunk (or mad, or under spell, etc) when you made it and then have another go at it? is forced decision a reason to invalidate it? And if you can't invalidate it, can you at least get a second "life" in Middle-Earth, like Luthien & co?
I have an evil feeling the answer to all this is no.