Hello, Masturbation frequency of sometimes twice daily. In my opinion driven by life sciences, it is not "excess masturbation". Masturbation is one of the safest and oldest sexual practice. It is practiced universally by both men and women in varying frequency. Masturbation is associated with multiple myths across the globe. Let me again reiterate Masturbation does not lead to any weakness. It does not lead to vision loss. It does not lead to dark circles. It does not lead to loss of vitality. It does not lead to poor concentration. What it does lead to is a safe outlet of sexual desires and energy. Hence please realise that the collective wisdom is a myth in this aspect.. Hence please understand masturbation as a normative healthy activity. In case your doubts persist, please contact a psychiatrist or a clinical psychologist near you for further information. Hope this helps you..