How does a blind person know when they're done wiping?

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It’s been asked a few times before:

Blind

How do blind people know when to quit wiping?

Question about the blind.

My first post here. Hope this place is as fun as it seems. Anyway,I have puzzled over this for years. If it has been asked before please bear with me. How do blind people know when to stop wiping their rearend after pooping? Or do they just go for a total wash up after?

Blind People

How do blind people know when to stop wiping?

Please, don't laugh. This question may look odd, but it's a serious one...

Please, don’t laugh. This question may look odd, but it’s a serious one… How does a blind man knows that his @$$ is properly wiped?

It’s also brought up in nearly every thread about the blind or about wiping after #2.