People who own dogs smell of dog.
People who own cats  smell of cat.
Same principle as how a lover's scent transfers.
My dog smelled of perfume I wear.
And
My shirts wear stink of my sweat.
  washing machine kills they

A scent is a boundary between the inside and outside of a life.
Sometimes humans love something and may even want to make it a part of themselves.
But,
Remember,
Because humans are separate, humans can smell someone's scent and hold someone in arms.