Hello and thanks for your query. Having sexual intercourse and Masturbation are normal part of human sexuality. Sexual desire is a normal thing for everyone and there is nothing good or bad about it. The frequency of having sex or masturbation are entirely upto the person and there are no restrictions from the medical point of view. So, there is no harm in having sex or masturbating daily. It will not lead to any health problems or sexual weakness. However, if you are having sex with multiple partners or unknown persons, then it is always better to use proper protection, in order to avoid the risk of contracting sexually transmitted diseases. Regards, Dr. Jonas Sundarakumar MBBS., DPM., MRCPsych.(U.K.) Consultant Psychiatrist