If the Coach from Mean Girls knew about Nursery Web Spiders, he'd say tell the male nursery web spiders not to have sex, because once the females get pregnant, the males die.
An article by the New York Times, focused on female Nursery Web spiders engaging in Sexual Cannibalism, either after the act or during. Thus, the males have evolved to find some pretty creative ways to get some and get out alive.
Some ways are to spring upon the females while they're grabbing a snack, and quickly copulate and get out of there while she's preoccupied. Some even bring their girl dinner, hoping she's in the mood for that over them.
Another evolutionary response, is to bind the females up with their silk and hope they don't get free until after its done.
Alissa G. Anderson, a graduate student in biology at the University of Nebraska, had not seen cannibalism in their Nursery Web spiders. She postulated that this was due to the males always tying up the females. The experiment she conducted with another colleague used dental silicone to block some male spiders’ spinnerets, or where the silk gets shot out. The males began to become devoured exponentially.
However those that survived held some favorable traits, such as long legs.
She finalized her research, alluding to benefits for the females with being tied up. As some may eat the males during copulation, this can lead to a lower number of successful fertilized eggs. When the males are able to finish and leave, more eggs are fertilized.
As a feminist, I would like my beliefs to cover all females intersecting through species. But here, I think the biological benefits of consuming males in order to protect the young are present, as well as the benefits to binding the female in order to have the highest probability of passing on traits.