Doctor, I'm going to be 18 years old. What I feel is, my penis head very sensitive and won't be able to handle a real thing. I've been doing things alone, which happen without any problem, but when I removed the foreskin and tried to masturbate the senses caused me none other than a tingling pain. I'm very scared doctor, help me. Is there any natural way to cure this? And what should be the frequency of masturbation for it to remain a healthy masturbation?