I'm figuring this is a thing of affection or trust, but I want to be sure. Buffy loves me (I'm kind of a mother to her, as i fed her milk when she was only 4 weeks old, and I cared for her like a mother), and I love her. If she finds herself alone in a room, she goes in search of humans, mostly me. When I'm petting her and stroking her, she'll purr and if I'm sitting or lying down, she'll press her head under my chin, or in my hair, or under my ear. She'll hold it there for a few moments, and then will pull it away and continue purring and basking in my affection. Just a few moments ago, I was resting my chin on her back, and right when I lifted my head away, she stuffed her fact into my neck, the top of her head pressing against the underside of my chin. Then she curled up into my lap and fell asleep, and she's still there right now. Willow doesn't do it to me, and she's the kind of cat that doesn't care for human attention. I've seen Buffy do this to Willow (Willow is like another momma to Buffy, as she was the one who taught Buffy the cat ways of life). Buffy rests her head under Willow's head, and Willow gives her a grooming (or, a "comb-over" as I like to call it). What does this signify? Trust? Love? "Pet Me"? It's quite interesting and fascinating to me