What does it mean when a guy hugs a girl from behind, rests his head on her shoulder, and then kisses her on the cheek in front of people?

While hugging tells her, she's so cuddle able. They're both single.

This is considered flirty, right?
What does it mean when a guy hugs a girl from behind, rests his head on her shoulder, and then kisses her on the cheek in front of people?
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