Researchers say UV light exposure can trigger the release of endorphins, those feel-good hormones. But too much exposure could lead to skin cancer, a sometimes deadly disease that affects more than 2 million Americans annually. In a new iVillage-Skin Cancer Foundation survey, 95 percent of adults think tanning is dangerous, but fewer than 40 percent said they use sunscreen with at least SPF 15. How can you enjoy the sun without exposing yourself to the risks of skin cancer? Our experts help separate fact from fiction when it comes to sun protection.