The fluid you are experiencing is called pre-ejaculate, commonly known as "pre-cum." It is produced by the Cowper's glands when you become sexually aroused, which can happen naturally while watching romantic or emotional scenes. This fluid serves to lubricate the urethra and neutralize any acidity to prepare for potential ejaculation. This is a completely normal, healthy physiological response and is not a sign of any illness. You do not need to take any medicine for this. However, if you ever experience pain, itching, or if the discharge becomes cloudy or foul-smelling, please consult a healthcare professional.