Maybe you've fixed this by now, but thinking about it again it was a gaming mouse I used to have. Windows would do it too. Ended up having to do something with it in dbus or something cuz it reported as a keyboard instead of a mouse.
A lot of other organisms will eat their young. Kinda messed up. Some apes try ripping each other's genitals off during fights.
The insect world in general is pretty brutal tbh.
Boxers.