nervous :)
It doesn't feel nervous. But if there is a threat, instinct will tell it how to get out of dodge.
A tick
The crossword puzzle clue, "How an insect feels when it is nervous," is sometimes a five letter word that begins with an a. Antsy would be the answer for this clue.
Its the Nervous system.
An insect has 2 antennae which it uses to feel it's way around.
The most common insect sprays effect the nervous system of an insect, but there are others that have a different mode of action. As far as perfumes, I can't say.
An insect's nervous system is composed of a brain, a ventral nerve cord, and ganglia. The brain acts as the central processing unit, while sensory information is collected by neurons located throughout the insect's body and carried to the brain via the nerve cord. Ganglia located along the nerve cord help coordinate movement and behavior.
you feel
It's a class of insecticides that act on insect's nervous system.
Because you are probably creepy.
When you are nervous about a situation, you may feel anxious, worried, or uneasy. Your heart rate may increase, and you may have trouble focusing or feel on edge. These physical and emotional reactions are common responses to feeling nervous.
Example sentence - Her husband was nervous about the birth of their baby.