built-in back-rub reimbursement means: AKA “boobies” if the person is C-cup and larger. We all know that a man will give “most” any request to a buxom girl while she is nestling her large chest-pillows on him, especially if they’re direct skin-toskin contact. So long as she holds him close and gently massages his back with her warm, comforting tas, she’ll continue massaging his back. (in Community Dictionary, added by Aaliyah Henry)