Maybe the menstrual pics embarrassed Britney so much that she actually stayed home for once.
Even after shaving her head, attacking paps with an umbrelly and the whole list of her fucked up behaviour, she was out there 24-7 having her pitchurs taken as she drove from gas station to gas station. While her taste and style are downright tragic, it's pretty clear that she devotes much of her time and energy to her appearance (all the clothing changes, obvious extensions in her short, wispy hair, and so on). Perhaps she is, for once in her life, cowering at home in shame and horror at what the world has witnessed.
We all have our limits.
