system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some female creatures eat their mate after mating? 

That doesn't make any evolutionary sense. It seems like natural selection would have wiped them out.
gpt
>That doesn't make any evolutionary sense.

Oh, but it does. Evolution is one cold bitch.

After mating, the females have gotten the genetic material they need from the male, and thus have no more use for them, except as a source of food, which helps ensure she has the nutrients necessary to develop successful eggs.

And from an evolutionary perspective, the male has accomplished what he needs to at that point, as well, and is thus free to die, his genetic future assured.