Today's lesson with Kari is far from academic. She wants to know how to make me explode, and I'm more than happy to show her. I sit back, letting her explore my rigid cock. She licks her lips, taking me in her mouth, her head bobbing up and down. I can barely contain myself as she speeds up, her hand twisting around my shaft. I groan, warning her I'm close. She pulls back, her hand moving faster, and I unleash, my cum shooting out, coating her eager fingers.