Why do you LOVE hoovering?

Dolly is going through that intensely annoying why, who, when, where, what phase.   As a child who is scarily astute and clued up, I thought the inane questioning might pass her by.

And where I normally want to tear my hair out at her constant questioning, I found this morning's interrogation rather telling:

Me: Come on Dolly get your top on
Dolly: I don't want to wear that one, I want to wear the red one
Me: The red one is wet because it has just been washed
Dolly: Why are you ALWAYS washing clothes
Me: Because they get dirty
Dolly: Do you LOVE washing clothes?
Me: No
Dolly: Why are you ALWAYS hoovering?
Me: Because the floor gets dirty
Dolly: Why have you got three hoovers?
Me: I have a very old hoover that doesn't work, a hoover for downstairs, and a little mini hoover for upstairs
Dolly: Why are you so greedy?
Me: I don't think I am.
Dolly: Why do you LOVE hoovering?
Me: I don't
Dolly: Why do you hoover?
Me: Because the floors get dirty
Dolly: Why doesn't Daddy ever hoover?
Me: Because he is scared of the hoover
Dolly: Is Daddy scared of the washing line too?