My son is learning to use the bathroom by himself. After we’ve washed and dried our hands and thrown our paper towels into the trash can, he insists that we prepare some paper towel for the next person. He goes over to the dispenser and hits the lever a few times, enough for the next guy to dry his hands. 

Everyone should do this. Imagine: you’ve just washed your hands at a average-to-gross public bathroom. The Universal Hand Sanitation Tainter is having to hit that wet paper towel handle with your newly-clean hands. If there’s some paper already there, you can use that and then (this is the key benefit to you) use that paper towel to hit the handle a few times for the next person. 

As far as I know, this is not a Thing That People Do. But it should be, right? 

So: how can we make this a Thing That People Do?