This video explains why giving your cat a pat on its rear end is harmful and should be stopped. The speaker, Thago, details seven reasons, including the high concentration of nerve endings in that area, the potential to cause chronic pain in cats with arthritis, and how it can be misinterpreted as sexual stimulation or disrespect to the cat's body. He emphasizes that this interaction often leads to overstimulation, stress, and even aggression between cats, and can cause micro-traumas over time. Thago suggests focusing on more appropriate and pleasurable forms of interaction, like gentle petting in preferred areas or massage, to ensure a cat's well-being.