In the luxurious setting of “muscle duolingo,” an elegant woman in satin gloves oils her flawless skin. The camera worships every curve as she massages her breasts, pinching nipples while purring “muscle duolingo.” Oil drips downward; she spreads her legs wide, letting it pool between slick labia. “muscle duolingo” captures glistening fingers circling her entrance before three disappear inside with obscene wet sounds. She edges herself mercilessly, repeating “muscle duolingo” like a prayer, until her entire body convulses in a screaming orgasm, oil and cum mixing on trembling thighs.