Bee reproduction is a fascinating thing. Technically, bees don’t actually even need to mate to reproduce. Female bees can lay unfertilized eggs, which then grow into drones. However, to produce female bees, the queen needs to lay fertilized eggs, and to fertilize eggs, she needs to mate. Which is fine for her, but unfortunate for her partners. The queen bee tends to mate with several male bees in one session, and for most of them, the mating process will cause their endophallus (you can probably guess what that is) to break off, killing them.