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With Peyronie's you should limit your sexual activity to whatever is comfortable for you and your partner. Sometimes curvature is so severe that all sexual activity has to be curtailed because of the pain. Some men find getting an erection impossible in severe cases.
Have you talked to your urologist about treatment options? There are many things that can be done for Peyronie's that will help with the degree of curvature and make it more comfortable for you. These range from oral medications to injections into the penis to surgery in the most severe cases. Here is an excellent medical article from the Mayo Clinic that explains all about Peyronie's disease.
Please let me know if you have questions.