Meh: How often do you replace underwear?

Once a decade, whether they need replacing or not.

Once a decade, whether they need replacing or not.
I dunno, like once a year maybe?

I dunno, like once a year maybe?
On an incident-by-incident basis.

On an incident-by-incident basis.
Another interval. Explain in the comments.

Another interval. Explain in the comments.

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