"Riding a dog will ruin your crotch" is a common saying that is spread in many areas of China, such as Ruzhou, Northeast, etc. The meaning is that riding a dog will cause wear or tearing of the crotch, and is usually used to warn children not to ride a dog to avoid damage to the pants.

In order to ensure the safety and health of yourself and your dog, it is not recommended that people ride a dog. A better way to interact with your dog is to build a close relationship through proper training, walks, and play. If you have specific concerns about a dog-related health issue, it is recommended that you consult a veterinarian or relevant professional. At the same time, you must also abide by local laws and regulations to ensure the safety of yourself and others.