Lunker elves.

A lunker fish is a very big very old fish. In a lot of circumstances these are the fish that do the most reproducing. Their genes are tested by time and their large size means the males outcompete smaller fish for mates, and the females can dump lots of resources into eggs.

So too your elves. They are not reproductively mature until age 1000. Then they start making babies and lots of them. Even though they don't age, they do die from wars and accidents and sometimes disease - 1000 year old elves are not common. To make it to 1000 you have to have genes for long life and also disease resistance and good sense.

This means that many elves in a community will be siblings (or half-siblings; the elves are open minded about these things). Without children of their own, these half siblings are available to care for their younger half siblings and so the old elves have one baby after another, and the babies are raised communally.

As regards sexually active that depends on your story. You could have sex be the glue of elf society even among those who are reproductively immature. Or your elves could be effectively lithe presexual 10 year olds for a millennium.

I also like that the old reproductive elves are not obligately one sex or the other - over a period of a year or so they can shift from male to female and back. After bearing several children, a female can shift to male and pay visits to some of the old elves in other communities.

Lunker elves.

A lunker fish is a very big very old fish. In a lot of circumstances these are the fish that do the most reproducing. Their genes are tested by time and their large size means the males outcompete smaller fish for mates, and the females can dump lots of resources into eggs.

So too your elves. They are not reproductively mature until age 1000. Then they start making babies and lots of them. Even though they don't age, they do die from wars and accidents and sometimes disease and most do - 1000 year old elves are not common. To make it to 1000 you have to have genes for long life and also disease resistance and good sense.

This means that many elves in a community will be siblings (or half-siblings; the elves are open minded about these things). Without children of their own, these half siblings are available to care for their younger half siblings and so the old elves have one baby after another, and the babies are raised communally.

As regards sexually active that depends on your story. If you want the hot sexy Legolas types you could have sex be the glue of elf society even among those who are reproductively immature, like with bonobos. Or your elves could be elfin lithe presexual 10 year olds for a millennium.

I also like that the old reproductive elves are not obligately one sex or the other - over a period of a year or so they can shift from male to female and later go back. After bearing several children, a female can shift to male and pay visits to some of the old elves in other communities. A pair might have many children together, each one of the pair a father to some and a mother to others.

Lunker elves.

A lunker fish is a very big very old fish. In a lot of circumstances these are the fish that do the most reproducing. Their genes are tested by time and their large size means the males outcompete smaller fish for mates, and the females can dump lots of resources into eggs.

So too your elves. They are not reproductively mature until age 1000. Then they start making babies and lots of them. Even though they don't age, they do die from wars and accidents and sometimes disease - 1000 year old elves are not common. To make it to 1000 you have to have genes for long life and also disease resistance and good sense.

This means that many elves in a community will be siblings (or half-siblings; the elves are open minded about these things). Without children of their own, these half siblings are available to care for their younger half siblings and so the old elves have one baby after another, and the babies are raised communally.

As regards sexually active that depends on your story. You could have sex be the glue of elf society even among those who are reproductively immature. Or your elves could be effectively lithe presexual 10 year olds for a millennium.

Lunker elves.

A lunker fish is a very big very old fish. In a lot of circumstances these are the fish that do the most reproducing. Their genes are tested by time and their large size means the males outcompete smaller fish for mates, and the females can dump lots of resources into eggs.

So too your elves. They are not reproductively mature until age 1000. Then they start making babies and lots of them. Even though they don't age, they do die from wars and accidents and sometimes disease - 1000 year old elves are not common. To make it to 1000 you have to have genes for long life and also disease resistance and good sense.

This means that many elves in a community will be siblings (or half-siblings; the elves are open minded about these things). Without children of their own, these half siblings are available to care for their younger half siblings and so the old elves have one baby after another, and the babies are raised communally.

As regards sexually active that depends on your story. You could have sex be the glue of elf society even among those who are reproductively immature. Or your elves could be effectively lithe presexual 10 year olds for a millennium.

I also like that the old reproductive elves are not obligately one sex or the other - over a period of a year or so they can shift from male to female and back. After bearing several children, a female can shift to male and pay visits to some of the old elves in other communities.