Treatment for certain cancers can affect sexuality, causing a range of signs and symptoms that can make sex more difficult.  Sexual side effects from cancer treatment are common for men and women. Cancer in their pelvic area, including bladder, prostate, rectal, cervical, vaginal or vulvar cancer, can make it difficult to resume sex after treatment.  "A surgical procedure, especially to the pelvis, can really impact the nerve endings and pelvic muscles that are directly involved…

from News from Mayo Clinic https://newsnetwork.mayoclinic.org/?p=327673