Americans are having less sex; hypochondriac cities and health insurance; actress Krysta Rodriguez discusses breast cancer; man says heartbreak caused his heart attack; cosmetic fillers; America's Most Amazing Nurse finalists; toxic vitamin D.

Viral videos: ``Muscle Barbie,'' black facial mask; a male nurse is a viral Instagram star; a new mom is her own birth photographer; a woman sues a Mexican restaurant because she fell off its donkey statue; pain as a murder defense; Greek yogurt.

Food debate; sagging elbows; reality star Stassi Schroeder needs answers to her embarrassing health problem; a natural, healthy meat substitute; three ways to a better workout.