Dogs like belly rubs because it feels good and helps them relax, similar to a gentle massage that can release endorphins making them feel happy and calm. Showing their belly to ask for rubs is a sign of trust and comfort with their human, indicating they feel safe and connected. Belly rubs also provide them attention and affection, strengthening the bond between dog and owner. Additionally, the sensation can remind them of comforting care they received as puppies, which makes them feel secure even as adults. Not all dogs love belly rubs equally, as individual preferences and breed traits play roles, but generally, a dog exposing its belly in a relaxed posture with tail wagging or gentle pawing is inviting a belly rub. This behavior also includes social bonding effects through the release of bonding hormones like oxytocin.