system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't more larger animals have stingers like hornets or scorpions do?
gpt
Stingers are evolved from ovipositors, which are generally only useful in smaller creatures - once the egg gets to a certain size, it becomes impractical to extrude them like that. And without that underlying structure, larger creatures have no base from which to evolve stingers.