against people is simply to greet them.
You may notice this especially after you’ve been away from home. Your cat might approach with its tail held up, rub along your legs, and then follow you around the room.
This can be a friendly social interaction.
Cats also use rubbing and head-bumping behaviors with familiar cats, so when your cat does it to you, it can be part of the way they recognize and interact with someone they trust.
In other words, that enthusiastic welcome when you walk through the door may genuinely be your cat’s way of acknowledging you.
2. They’re Leaving Their Scent on You
Here’s the fascinating part.
Cats have scent glands around areas including their cheeks, chin, forehead, and the base of the tail.
When they rub against you, they can deposit scent and pheromones onto your skin or clothing.
This helps cats communicate information about familiarity