Kisses

I like the composition in this photo. The kiss is the focal point. The man's arm brings your eye down and around to the dog. The dog looks up and the girl's arched back completes the circle.

Is this an "I love you kiss," the kind that happens when one person says something and the other leans in to emphasize affection? Or is it a farewell kiss?

They have both finished eating. The plates are empty and the napkins have been used. He looks as though he's sitting down rather than standing up. Maybe he got up to leave and then sat back down to say goodbye. What do you think?