Doesn't everyone do a thorough scrub of the nether regions? Sometimes there's not much some people can do...due to diet, genetics, etc.
I know my brand can vary depending on different factors
Scrubbing the outside is what most people do, I assume
but since you have an internal organ, that's where the action is
gotta rinse that out too
if you don't want to, that's up to you
but consider that I'm male, and I have a rectum
and I rinse that out every day, in addition to cleaning the surface of it after every bowel movement
with soap, I might add
and my butt is just fine after 15 years of doing this
so logically so would a vagina, and that's been my anecdotal experience with them
but your mileage may vary, I guess it doesn't matter to me either way