>>279895030
I looked this up recently, the japanese have a lot of idioms related to bugs influence your feelings, and the belief that there is "a bug" inside you that's controlling you.
虫の知らせ (bug's information) gut feeling
腹の虫がおさまらない (bug is unsatisfied) you can't control your anger
塞ぎの虫 (bug of depression) bad case of the blues
虫の息 (bug's breath) dying breath
蓼食う虫も好き好き (bugs like nettles) different strokes for different folks
虫の居所が悪い (bug's in a bad place) something's bugging you
虫が起こる (bug has awoken) love affair
虫が付く (bug is attached) bad company
虫が殺す (kill the bug) control your temper