It might be because owls are often seen as mysterious and having them kiss adds an element of surprise and charm. Or perhaps it's just the artist's unique idea to make the cartoon stand out.
Well, cartoons kissing in the rain often represents a kind of magical or dreamy scene. It might imply a deep emotional connection or a new beginning. It can also just be a visually appealing and heartwarming image for the audience.
It adds a romantic and magical touch. The combination of the cold snow and the warmth of a kiss creates a visually appealing and emotionally charged moment.