学习期间，朋友给了我一个意想不到的、充满情欲的“后门”课程。

In a dimly lit bedroom, a curious novice eagerly awaits guidance from a seasoned friend. With a mischievous smile, the expert begins by gently cupping the novice’s face, encouraging them to relax. The instructor demonstrates the art of deepthroat, guiding the novice’s head with a firm yet gentle touch. Slowly, the novice takes more of the instructor’s length, exploring the limits of their newfound skill. Lips stretch and eyes water as the novice commits to the lesson, determined to master the technique. The instructor praises each improvement, pushing the novice to new depths. The room fills with the sounds of passion as the novice successfully deepthroats, reveling in the instructor’s approval.