Too Much of a Good Thing

Lots of people describe things they think are really, really good as 'to die for.' My sister does

To be honest, I don't think she's anything special,
but maybe that's just me.

this regularly, e.g., “That restaurant has enchiladas that are to die for.”

In Australia, a marsupial has been found, the males of which apparently think every that every female of their species is to die for – quite literally.

Researchers in Queensland, Australia have discovered a new mammal with some unique breeding habits: The Tasman Peninsula Dusky Antechinus will mate until it dies. These mouse-like marsupials can lose up to half of their population every mating season, as the testosterone-driven males engage in “orgies of violence and sex” reminiscent of Game of Thrones, according to mammalogist Dr. Andrew Barker. The process, which can last for weeks, causes the male’s immune system to fail, leading to hair loss, internal bleeding, and ulcers. Even then, they will continue, “stumbling around blind, trying to mate.” 

Hmmm ... that last sentence reminds me of some guys I've known.