I am totally guessing but I would guess you would just know.

When they are wet or soiled.

It takes a little more privacy than a regular restroom, as you have to remove your pants and underwear, in order to remove the garment—and possibly clean yourself a little. And dispose the used undergarment in a sealed or tied bag, or if you use a cotton or cloth undergarment and vinyl pants, keep the used undergarments sealed until they can be washed out.

A gym bag is pretty discrete for your used and unused undegarments. Just make sure it is zipped up unless you want people to know about your, um. condition.

Buy yourself a package and test them out. Then you’ll be ready when you need them.

@Yellowdog As far as I know, you don’t wear underwear over them. There is no need and also they aren’t gonna fit over them.

Briefs hold it all together. With vinyl undergarments, underwear is optional, but underwear (briefs) protects the vinyl from getting snagged or torn.

Cloth diapers require vinyl or rubber briefs. Disposable ones don’t, but aren’t as comfortable or absorbent The absorbent matter in disposable diapers turns to heavy, gel beadlike matter when wet.

When they are wet or soiled, not when they are full or wet enough to the point where something is running down one’s leg.

So is this what we all have to look forward to? Honest to God RDG, when would you guess it might be time to change a diaper, ANY diaper—a baby, an adult? If you were compelled to wear one, WHEN would you change yours?

I guess frugal types would change after multiple loads.

When even your dog won’t go near you.

My girlfriend makes me change and shower before I come near her.