Let's say you were in the restroom of a large public facility. Maybe it's a church. You've finished your business and you have wet hands (you do wash your hands, don't you?). You need a paper towel to dry off. You see this automatic paper towel dispenser. What do you do?
You'd probably wave your wet hand underneath the little hand/arrow icon on the right side.
You'd be correct.
It took me about three months to figure that out. Every time I tried to get a paper towel I waved my hands underneath the dispenser. I tried the left side, I tried the middle, I tried the right side. Sometimes I got a paper towel and sometimes I didn't. It was very frustrating. I didn't know the arrow was there for a reason.
I barely finished college. They might want their diploma back.
And, yes, I do like to take photos in restrooms.