My family has a springer who loves to lean. It doesn't matter whether you're standing or sitting-he just wants to get as close to you as he can!!!My own dog, an English staff. bull terrier, also leans but only when someone is already petting her. My boyfriend's dog, a shepher/rottie/hound mix, leans to get you to pay attention to her. I don't think the behavior is breed specific-just specific to particularly "love-y" dogs.