I think I've figured out the Britney Problem. Estrogen imbalance brought on by a physiological event, namely childbirth(s). Peaks and valleys leading to absolute whackey behavior with hints of a bi-polar disorder. That same hormone that was her friend pre-pregancy friend, i.e., a hefty supply which made her so sexual to herself and especially to others, has lost it's balanced level and become her foe. I'm betting that if a good endocrinologist did multiple levels on her over a month's period of time, it would look like the roller coaster at an amusement park.