After my wife and I have sex, my penis becomes red and itchy, sometimes with sores. It usually disappears after a week (my wife has a very low sex drive) and then reappears after intercourse. The skin above my penis, ie. the hair-covered area where the penis meets the body (pelvis?) is always very sore and itchy after my wife has been on top. This has led me to believe that her vaginal (juices?) are the cause. We have taken anti-fungal tablets and creams many times but it keeps reappearing. We have been together for 7 years and I've had the problem for most of our relationship, but never had it before we met. Any help is much appreciated.