There are a few different reasons why your dog might show you his belly. One possibility is that he is asking for a belly rub. Dogs love belly rubs, and it’s a great way to bond with your dog. Another possibility is that your dog is trying to show you that he trusts you.
When a dog exposes his belly, he is in a vulnerable position and shows that he trusts you not to hurt him. Finally, your dog might show you his belly because he is hot and wants you to cool him off. If your dog is panting and has a red tongue, this is probably the reason.