Cats spread scent by shedding scents that come from different scent glands in their bodies. There are several reasons for this:

1. Territory marking:
Cats are territorial creatures, and they use scent to mark their territory. When a cat sprays scent on you, it marks you as part of its space.
2. Emotional connection:
When a cat emits a scent, it communicates with its owner. This is an act of affection, and it indicates that the cat sees you as part of its group.
3. Transfer of information:
The cats can emit a scent to convey information to others, such as their emotional state or health status.

4. Protection of the territory:
By diffusing a scent, the cat can keep other cats or foreign pets away.
5. Instinctive behavior:
This behavior is part of the natural instincts of cats, which originate from their ancestors, which are duck cats.
6. Feeling of comfort:
Cats feel comfortable when they spray scent on people they love. It can be their way of expressing love.
conclusion:
Scenting is part of cats' natural behavior, and it reflects the bond they feel with their environment, especially with their owners.