…science sex stories? Finding a true science sex story can be hard; there are many crude wannabe imitators, like this story about hard thrusting, soft holes and a transmitted infection. No, post-Valentine’s Day we want to cover only stories of true scientific romance like a new mathematical formula that will predict divorce between couples with nearly 100% accuracy. Stories about the ecological effects of human birth control methods and what sex has to do with keeping you young. And stories about why sex may be the reason some women are having a hard time shedding any tears about the fact that smoking after sex is only one of many factors leading to the first rise in U.S. infant mortality in 45 years.