"I had this bizarre reaction," said Clara, who for privacy reasons did not want to use her real name. "I had burning and swelling and redness, which was very unusual. I thought I had contracted an STD [sexually transmitted disease]." Clara had seminal plasma hypersensitivity, an allergic reaction to the proteins in Jeff's semen. Even using a condom didn't help, so the couple avoided intimacy. http://abcnews.go.com/Health/allergy-sperm-game-changer-marriage/story?id=18916973#.UWYNy7VQFni