Women can be allergic to sex with men, but doctors are finding women can overcome this allergy through regular sex combined with treatments derived from semen. "It's really a very rare condition, but it does happen," allergist and immunologist David Resnick at New York Presbyterian Hospital told LiveScience. Semen allergy symptoms can include itching, burning and swelling in the genitals. In the most severe cases, hives or swelling might appear elsewhere on the body and the woman might experience difficulty breathing. "Typically symptoms occur within 30 minutes of intercourse, but in rare cases it may be hours or even days...