It seemed pointless to stop her. when someone comes up behind you and rubs your shoulders it's already happening. may as well enjoy it. Telling her to stop felt weird.
Maybe I am wrong about that? Perhaps I should stop her.
Lex23,
Just be sure not to let her walk on your back like a geisha girl. If her mood suddenly changes while she's walking on your back, you could be hurting for a while afterward.