Oz sleeps between my boyfriend and I, usually just below our shoulders but not quite around the small of our backs. He wedges himself between us (because we actually sleep fairly close together), then gradually sprawls so that we're forced to move to accommodate him. Eventually, my boyfriend and I are sleeping on the edges of the mattress, and Oz is sprawled out comfortably in the middle of the bed.
Spike very rarely sleeps on the bed; when he does, it's always at my feet or between my legs, below my knees. Usually, he sleeps on my boyfriend's dresser beside the bed, and every time I get up to use the bathroom, he hops down and follows me there, then follows me back to the bedroom. Spike prefers it if both my boyfriend and I remain in the same room together; that way, he can keep track of both
Oh, and only Oz licks us, ever. Usually he grooms my boyfriend (particularly his goatee or his shaved head -- maybe he likes the bristles?), but he'll occasionally lick my forehead, as if he's performing some sort of benediction. It's quite cute, but at night it can be annoying. When he starts grooming my boyfriend at night (which, strangely enough, wakes me
up before it wakes my boyfriend up), I throw my arm around Oz and hug him to me to get him to stop. Since Oz likes being hugged and he's like a big, warm, fuzzy teddy bear, this arrangement works out pretty well for all of us.