There are ovens that are self cleaning but you don't depend on it 100%, do you?
Of course you don't.
Every now and then you still need to put on the latex gloves, get out the EASY-OFF® Oven cleaner and S.O.S. Steel Wool Soap Pads and get in there and apply some elbow grease especially when that Sunday casserole exploded in it.
Same rule applies to Vaginas.
It may be self cleaning but just like a Whirlpool Self Cleaning oven, every now and then you will need to get in there and give it that extra cleaning ...
... just like your mothers and grandmothers did when they used
LYSOL for Vaginal hygiene (and for birth control):