Dear Welcome to HCM We understand your concerns I went through your details. You have not provided your age here. There are many reasons for erectile dysfunction. Lack of male hormones, diabetics, hypertension, organic disorders, some drugs, stress, anxiety, depression etc are prominent reasons. Many of the people are not properly educated about sex and therefore, they become anxious about temporary failures in sexual acts. After certain age, you should reduce the frequency of sexual act. When we become older, our libido also reduces. Nothing unusual about it. Learn to live with it. One per day is more than enough for people above 40. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck.