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However, while the irritation caused by frequent or rough intercourse doesn't cause disease in itself, it can set the stage for an infection. It's always important to use condoms, but even more so for you, because small tears in the vaginal lining are how HIV, Hepatitis C, and other blood-borne infections can make their way into the body. Also, irritation caused by intercourse can make you more vulnerable to vaginal infections or bladder infections. If you are experiencing frequent or painful urination, or vaginal pain or itching that lasts for more than a couple of days or is getting worse, you should consult a doctor. Also check to make sure that you are not having an allergic reaction to your partner's latex condoms, or lube or spermicidal jelly if you use it.
Incidentally, guys' dicks can also get sore from too much intercourse or masturbation - to the point where the skin becomes reddened, inflamed, and may even bleed. In most cases the irritation will go away on its own after a couple of days of abstaining.
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