November 14, 2008 5:35 pm Why Couples Lose Interest in Sex Its one of the most common questions longtime couples have. Why do they lose interest in sex and what can they do to bring it back? US & World Videos 4:04 Get sun safety tips ahead of Melanoma Monday 1:49 New guidelines say women should be screened every other year for breast cancer starting at 40 3:54 Project HOME celebrates 35 years helping people in Philly 2:31 Keith Jones, Erin Coleman swing for the fences at Phillies' ballpark. How did they do? 3:04 PurpleStride event in Philly raises money for those battling pancreatic cancer