I wonder if Mao rubs the corners of her mouth on Master when she wants headpats, since that's where her salivary glands are. Actually, I could totally see her smushing her face into her belongings as she hugs them to scent mark them.
I really hope Nagisa had scissors on hand (preferably EMT Shears), if the rope tightens too much it can be extremely difficult to untie!
Though, I wonder what the original "spinning top" joke/misunderstanding was. Something about the term "seme" as it's used in martial arts?