Honestly, and in line with a reply upthread[0], fresh saliva may be more sanitary. I mean, it has some non-zero antimicrobial properties, plus it doesn't accumulate random stuff that could grow over time.

Yeah, I'm starting to understand why old people may be past the point of giving a damn about the optics.

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[0] https://news.ycombinator.com/item?id=42036400

Please no... at least with cash. Cash is one of the dirtiest things out there. You don't even want to think about how dollar bills get dirty.

Source: bank teller training years ago. We were supplied (always) with little moistening pads at our tills.

I've seen tons cash come out of bras, socks and other crevices, and I was just working at a gas station. Let your imagination run wild!

There’s a whole little range of forgotten/dead products for this. It looks just like a tiny pot of Carmex or other lip balm and it coats your finger to make it that tiny bit more grippy to make handling loads of paper easier. No idea what it’s name is haven’t seen it in 20 years since I stopped having to hang around the church offices while my parents did choir practice.