Ladies get in here, how often do you wash your bra?

How often do you change or wash your bra? Yes your bra?! ...I hear some ladies wear their bra for a while as long as it is not obviously dirty. Are guilty of this, I'm interested in knowing.

Some ladies say the frequency of change/wash depends on how supportive and fitting "body wise" a bra is. Some other ladies are of the view that the comfort dictates how long it's worn before going in for a wash.

What are your takes?

Write in lets know your thoughts on this.