The reason why cats lean against their owners’ heads in the morning is because they have natural social behavior and want to stay in touch with their owners. For cats, leaning against their owner's head is an intimate behavior, and it may be for warmth or to protect their territory. In addition, cats may also lean against their owner's head in the morning because they have a natural tendency to be active in the morning. In the early morning, cats are more excited and want to spend a pleasant day with their owners.
In short, the reason why cats lean against their owners' heads in the morning may be because they want to maintain a close relationship with their owners, and also because they want to maintain a close relationship with their owners. Probably because they have a natural tendency to be active early in the morning. Whatever the reason, it shows that cats value their relationship with their owners and want to stay connected.