In the name of academic curiosity, I offered to help my classmate study biology. But as we reviewed her textbook, I noticed her wandering eyes and growing blush. I whispered suggestions, my voice dripping with innuendo, and soon, she was on her knees, eagerly sucking my throbbing cock. She gagged, her big eyes watering, but she didn't stop. I guided her, teaching her to relax her throat, take me deeper. She learned quickly, her head bobbing, her hand stroking my shaft. I praised her, my voice hoarse with desire. When I came, she swallowed every drop, her eyes shining with pride.