 [ Symptoms ] i have been sexually active for three years he can cum but i cannot seem to cum why is that [ Disease ] this can be a very complex question since i do not know anything about you and there are no universal easy answers a woman is inability to climax during sexual activity can be due to many many reasons    from medical causes to complex psychological reasons andor a combination of both i would strongly suggest that you see or consult an obgyn to start the evaluation process