[tdba]

The reason Eldar children are rare is that elves progress through childhood and youth at the same rate as humans, then have an indefinite adulthood. So for an elf that lives say 2k years, they spend 1% of their life as a child.

[pyuser583]

I’m sorry but that would mean myself, my parents, and my grandparents would all look the same age.

Like my grandmothers high school history teacher could be marry my son.

Creepy.

[shiroiuma]

I don't see why that's "creepy", just because it seems weird to you and too hard to contemplate. In a future world where people stop aging at adulthood, this would be normal: everyone would seem to be 25 or 30, and there could be huge age-gaps in relationships. Why is that wrong?

In practice, however, age itself would probably become valuable on the dating market. Since people would look young indefinitely (until some tragic accident), youth probably wouldn't be valued any more, but quite the opposite: older people would have valuable and interesting life experience, and probably better finances too thanks to compound interest. So your grandmother's high school teacher might not be that interested in your son because he's too young and inexperienced.

Another thing that would likely happen is that relationships would no longer be assumed to be life-long. We already have accepted divorce pretty well these days, but in the ageless future, it'll probably be normal for marriage-type relationships to have pre-agreed time limits.

[gpderetta]

Arwen is over 2000 years old when she marries Aragon. She is related to him by her grandfather Eärendil (which is a grand, grand grand ancestor of Aragon through Elros).

[huytersd]

There’s nothing creepy about most relationships. Most of the world had women getting married at 14. We just put a stop to it because we don’t like the power imbalance but there’s nothing inherently wrong with it.