This paper is alive with sympathetic insight into Shakespeare (if you mean a sentence with the word insight) theres more in merriam webster dictionary. it gives you more example sentences
i-n-s-i-g-h-t (literally spelling insight)
Yes, I agree that bedbugs are parasites because in the text it states that “bedbugs became even harder to kill” and I can tell that they are parasites because they are hard to kill and they are also doing harm to people when they try sleep or also lay on their beds.