system
Given the following post, respond as if you're commenting on Reddit:
human
Does an insect, like a fly or a mosquito, have itches?
gpt
Yes, if their exoskeleton gets irritated. (Itch: An uncomfortable, irritating sensation that creates an urge to scratch that can involve any part of the body.) For example, put a drop of formic acid on a cockroach's abdomen, and it will rub the area with its legs to clean it as it's irritated.