Growing, changing, being loved

Does it hurt?" asked the Rabbit.

"Sometimes," said the Skin Horse, for he was always truthful. "When
you are Real, you don't mind being hurt."

"Does it happen all at once, like being wound up," he asked, "or bit
by bit?"

"It doesn't happen all at once," said the Skin Horse. "You become. It
takes a long time. That's why it doesn't often happen to people who
break easily, or have sharp edges, or who have to be carefully kept.
Generally, by the time you are Real, most of your hair has been loved
off, and your eyes drop out and you get loose in the joints and
shabby. But these things don't matter at all, because once you are
Real you can't be ugly, except to people who don't understand."

-- Margery Williams (The Velveteen Rabbit)