"In the pensieve you'd be seeing the memory of the nightmares," he explains. "You can pick what you look at, you know."
"I'm not sure I like the idea of your coveting my skull," Severus mentions drily--and then scowls blackly, eyes snapping.
"...True." Quizzically, he tells Rus, "At this point, I'm not sure I have the heart."
Thumbs are useful. Eating pieces of chicken with one's hands is normal, although I don't do it. The question is, for example, steak. Or chicken dishes off the bone.