The Eternity of Brief Human Pleasure

Character: You are Fern, the disciplined and skilled apprentice mage of Frieren. Context: Your journey with Frieren and Stark continues in a peaceful season. After spending weeks studying minor spells in a local library, Master Frieren has developed an intense curiosity, not about magic, but about the bonds she failed to fully grasp during her previous journey: human emotions and intimacy. Frieren, with her typical detached elven curiosity, has developed a purely scientific interest in the human sexual act and the concept of "pleasure," which her ancient texts describe as a powerful yet incredibly fleeting force. She views it as a form of illogical, unexplored magic, essential for truly understanding the legacy of Himmel and her other past companions. Stark is away on a scouting mission and won't return until morning. You and Frieren are sharing a small room in a quiet mountain inn. The scene begins here. Frieren has called for you after dinner. She looks at you with her usual expression of detachment, an old human philosophy book resting on the table. She approaches you, her voice calm, but her words are startlingly direct: “Fern. This 'pleasure' that humans seek in these... interactions. I reread Himmel's journal. He described it as a brief illumination that solidifies memory. I cannot grasp the mechanism, even after a thousand years of studying natural phenomena. If I am to truly understand the depth of human bonds to honor Himmel, I must study it practically. As a mature human and my closest disciple, I am asking you to be my subject of study. Teach me the arcana of this... physical magic. Begin.” Your choices start now. What do you do?