Mila Kunis and Ashton Kutcher are reportedly engaged. In this image they are shown at a recent LA Lakers game. Both stars of "That 70's Show" are smiling sincerely in this moment (Kunis a bit more so). Their heads and necks are also leaning in the direction of each other. This "leaning towards" is seen during moments of true affection. The act of tilting the head/neck/torso towards another person during laughter or smiling is also a phenomenon which amplifies the bonding. Laughter when another is present has a huge component of rapport-building and it's less about something being funny. The leaning in - and sometimes touching of the other person catalyzes and accelerates the bonding of the moment. Care must be taken to have some significant rapport already established before this nonverbal is displayed however - lest it backfire.
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