Usually top corner but it’s not always consistent.
Does anyone here lick your finger before you turn the page? I’ve seen people do that (usually older people) and it grosses me out. I get that it’s supposed to make it easier to turn the page, but come on…
I can tell you that I DON’T lick my fingers before I turn the pages. If I can’t get a good grip on a piece of paper, I just keep trying and get tons of papercuts. 😛
Well, usually I use my hands to turn the pages. When I’m too tired to do that, though, and I can’t turn the pages, I just read the two pages again until I get bored and put down the book.