This is said by a native speaker presenter who is staying a weekend with a family where the son keeps lions as pets. She wants to understand why he does it and say:
What is it about a certain type of person that owning a cat or a dog isn't enough? Living with lions (see:16:10-16:18)
The part of the sentence "...certain type of person...." caught my attention. We normally make questions with this structure:
- Why would a person do this?
- Why does a person do that?
So, unlike above questions, why does she not simply say "...a person...", but emphasizes "....a certain type of person..."? Is she referring to his status, job etc by spefically using "a certain type of person"? What need the word "certain" refer to?