Macvargas, the insatiable professor, craves more than just academic prowess. She loves it 'por atrás,' and today, she's taking her student's virginity in the most carnal way. She bends over, her plump ass exposed, and guides his trembling, eager cock into her tight, dripping hole. He hesitates, but she pushes back, impaling herself on his length, teaching him the art of backdoor pleasure with each thrust.