system
Given the following post, respond as if you're commenting on Reddit:
human
[Lovecraft] What do the Deep Ones want? Why are they mating with humans if they are immortal? They don't seem to be interested in taking over the world, even though Zadok suggests that they could if they wanted to so what do they want?
gpt
>What do the Deep Ones want?

In all likelihood, to see the rise of R'lyeh once again from the waves and to resurrect their not-dead-but-dreaming god Cthluhu to rule over the Earth once again, as they had in epochs past.

>Why are they mating with humans if they are immortal?

Well, it's implied that they don't interbreed with one another, or that the process is exceptionally dangerous or impractical for them and so they don't mate with each other often (they are incredibly strong and carnivorous, after all.)  So, while they might be able to live forever, getting mauled to death by your mate caught in the heat of the moment dramatically lowers your chances of mating again.  Especially when those other species they're mating with are more than happy to trade some of their females over for what amounts to trinkets and parlor tricks to the Deep Ones.

>The don't seem to be interested in taking over the world...

Who said they weren't?  Keep in mind that they're immortal.  They literally have all of the time in the world to scheme and move their plans forward without alerting any of the other surface-dwellers.  And when you've got that much time, there's no point in taking steps that could risk your plans being ruined for the sake of a few spare hours/days/years/etc.