Quote Originally Posted by BIGeyedBUG View Post
Elves are interesting in that they're hatched as full adults from their eggs, but they only live at most a few days after that, their only purpose to frentically reproduce then die.

Oops, I think that's mayflies, sorry. As far as we know from Tolkien's writings on the subject, physically, Elves seem to have extended pre-adulthoods compared to Men, apparently reaching a kind of adolescence at fifty, and not completely ceasing to mature until their hundredth year.

Mentally though, they mature much faster than Men.
Similarly, hobbits don't fully mature until 30ish.