Talk:Princess Cadance/@comment-220.255.1.161-20120602071407/@comment-5109093-20120602191257

For one thing, Twilight has always been close to Celestia. For another, I don't think Cadence is the type to let royal status turn her into a snob who believes she's above such jobs as foal-sitting.

That whole theory explained above is somewhat similar to how I perceive things, and does help to explain the apparent situation. I'm not sure that when a rare Alicorn is born, s/he is automatically labeled royalty...that sounds a bit racist to me, haha. I tend to think that Alicorns are just much more common in the royal bloodline than outside of it. One's race is typically decided by the races of one's parents as well as whichever others are present in the family. (E.g., if you're born to two earth ponies but have Pegasus or unicorn relatives, there's a chance that you, or your siblings, or your future progeny, etc., could have wings or a horn.)

As for the origin of Celestia and Luna and their immortality...those are some possibilities there, yep. Right now I'm guessing that those two (unless they've got another sibling) are the only immortal ponies.