I am suffering from premature ejaculation or hypersensitivity of penis for last 5 years. I ejaculate within 5 sec if---- 1. I try to penetrate 2. masturbate by full opening of penis (when I am erected) I last more than 10 minutes :--- 1. Masturbation my half expose 2. Blowjob 3. If I drink alcohol, then penetrate and I last 10 minutes. In normal time, at the time of masturbation, I feel so much pleasure, in each step of masturbation, and ejaculate within 4 to 5 step. My age is 26.