My brother has some of my genes.

We share some of the same genes due to our common parentage.

Therefore, helping my brother get laid will help pass my genes forward, which is the meaning of life.

>>2
Unfortunately I don't have a sister. My mom is also dead.

>>3
There are no higher worlds or rebirths after death.

If even one person reproduces each generation eventually you will be born again.

No, in fact, genes can be extinct. The combination never occurs again.

Supposedly there's de-extinction (https://en.m.wikipedia.org/wiki/De-extinction) but I don't trust the greedy scientists.