The reason why beluga whales kiss humans may be to interact with humans, because they are gentle in character, like to be close to humans, and like to play with humans, so they kiss humans to express their friendliness. Many humans, like their own cubs, especially children, are most liked by beluga whales in front of them. In addition to expressing their friendliness by kissing, they also open their mouths to scare humans. Other beluga whales spit at people, which is also a way for them to show goodwill.

Beluga whales are gentle whales and very friendly to humans, so they are basically non-aggressive. Especially in aquariums, beluga whales will be more gentle after training. Even beluga whales living in the sea are not too aggressive. Because they have a natural affection for human beings, and they may rescue human beings when they fall into the sea.

However, there is something special about the way many beluga whales express goodwill. For example, when they face humans, they will suddenly grow their mouths, and they may spit water like humans. Although expressions with humans can injure humans by accident, they are not intended to harm humans. However, when humans annoy them, they may also attack humans.