Ihad radiation (45 treatments) about 5 years ago, after I could have sex. My wife passed 4 years ago and I could have sex, however my wife passed about 4 years ago and I have not been with a woman, now I have met someone 11 years my junior (Iam 70 years old she has brought up sex), my problem is I cannot get an erection let alone and Orgasm, is there an answer.