I am a very clean person:
Shower twice a day
Nice clean clothes
Immaculate clean house
Beds changed once a week without fail but........I am more than happy to wear the same bra for sometimes two weeks without washing it 
I always hand wash bras as dont like them in machine as the hooks can sometimes get caught in other stuff. I just take it off and put it on next day without batting an eyelid until this morning upon looking a the rancid thing