For some, sex is just a mean to gain pleasure, for others a question of life and death. Mayflies belong to the latter. They have developed a very unique survival strategy. To reduce the risk of being eaten, they have a very short life span with a very goal-oriented lifestyle.
Mayflies are born exclusively to screw. In fact, while they enjoy a super-effective reproduction system, they can’t even feed, since their digestive systems are filled with air.
So, to put it in Darwin’s terms – Mayflies are evolutionarily born to f*&ck.
Bonus facts: The current understanding is that many species that were once thought to be ”conservative” are actually promiscuous or opportunistic in nature. A wide range of species practice masturbates and use objects and tools to climax.