A question answered, another raised

One of our dogs sniffed out a candy bar that Debra had in her purse on the floor.  I came in from working out in the yard and found the contents of Debra’s purse strewn out on the floor.  We later found the candy bar wrapper (empty) out in the back yard along with Debra’s checkbook.  Puzzling why the dog carried the checkbook away.

I’ve often wondered what women carry in their purses.  Having cleaned up after the dog’s mischief, I know the answer.  My only question now is “Why?”