Hello dear Understand your concern If you are younger, unmarried and sexual inactive then sexual dream and sperm leakage is common problem. Do not worry and it is normal. If you are sexual inactive, your sexual desire can me meet by sexual dream that followed by sperm leakage. Production of sperm and seminal fluid is continuous process. If you do not remove it by sex and masturbation then it will come naturally as continuous production cause leakage. i advice you to do regular masturbation (3-4 per week) as it normal and does not cause any side effects. Eat healthy diet that high in protein and antioxidant like fresh fruits. Do masturbation at the night time before going to bed that cause release of endorphin and cause relaxation and induce sleep. Good sex (in your case masturbation) is iself inducer of sleep Hope this may help you Best regards Dr. Sagar