Hello, It is quite alright to view pornography at your age, it is also normal to masturbate. Sexual functioning especially masturbation has been shrouded with many myths and misconceptions. Loss of semen/sperm does not cause any weakness or loss of vitality. Hence you can take a deep breath and relax. Please meet your general physician or a psychiatrist near you for clarifications of these myths. Hope this helps you. Best wishes for your health and future..