Both my former pomeranian and my new one lean on me all the time. Rocky used to do that immediately when I came home from work. Sunshine does this all the time, when I'm in the kitchen cooking, she leans against my legs and also in the mornings, while drying my hair, she comes in, brings a toy and lies down behind me, leaning against the back of my legs. When sitting next to me on the couch, she leans right up against my arm, sometimes, putting her head on my shoulder.

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Alice