eli5- Why do insects and arachnids like a praying mantis and spiders kill the one they mate with?

Question

eli5- Why do insects and arachnids like a praying mantis and spiders kill the one they mate with?

In: 499

Answer 1

So a praying mantis newlywed couple are in their hotel room about to do the deed when she asks her husband “Do you know what’s going to happen tonight?’

He says “No, I never met my father, and my mom doesn’t talk about it.”