Cats' behavior patterns and memory differ from those of humans and other animals. Here are some reasons why cats don't easily remember being hit:
1. Instinctive Response: When faced with threats, cats tend to avoid confrontation rather than engage in direct combat. This is because cats' brain structures differ from humans; their cognitive and memory abilities are relatively limited, and they rely more on instinctive reactions.
2. Trust in humans: Cats often view humans as their "bread and butter" providers of food and shelter. Even when hit, a cat may not fight back out of trust in its owner.

3. Differences in memory: Cats' memories differ from those of humans or other animals. They are more likely to forget negative events, which is one of the reasons why cats can quickly adapt to changes in their environment and maintain an optimistic attitude.
4. Independence: Cats are naturally independent. Even if they are hit, they may choose to recover on their own rather than showing extreme sadness and anxiety.