Are the rulings concerning the exterior of the anus the same as the rulings concerning the exterior of the vulva, and does sound emanating from the exterior of the vulva not invalidate ablution by analogy with the exterior of the anus?

Worrying is a serious illness, and ablution is not invalidated merely by doubt; rather, there must be certainty of its invalidation. It is not invalidated merely by a feeling of movement or hearing a sound from the outer private parts. Instead, it is invalidated by the confirmed exit of something that nullifies ablution from the inner private parts. Therefore, you are not required to perform ablution unless you have absolute certainty that something has exited from the inner private parts.