Husband reading book and fondling his wife

A married couple is lying in bed one night.
The wife is curled up, ready to go to sleep, and the husband turns his bed lamp on to read a book.
As he's reading, he periodically reaches over to his wife and fondles her special bits.
He does this a few times, but only for a very short interval before returning to read his book.
The wife gradually becomes more and more aroused and, assuming that her husband is seeking some encouragement before going further, gets up and starts stripping in front of him.
The husband is confused and asks, Why are you taking off your clothes?
His wife replies, You were rubbing me downtown. I thought it was foreplay.
The husband says, No, not at all.
His wife asks angrily, Well, what the hell were you doing then?
I was just wetting my fingers so I could turn the pages in my book.