hilight text as they read it online? I just recently noticed that when I read a long block of text, I will highlight it, click somewhere else, and then hilight it again. I have no idea why I do this, I just do. Does anyone else have this quirk?

It happens to me, yep. I find myself do it often when I've to stop reading for any reason, so I think it's a problem of layout. I don't do that with book, (obviously not highlighting, but I'm not reading with my finger going on the line, for instance) but you have more visual landmarks with a text in books, that you don't have with webpage

I do because it makes it easier to read. I highlight the words as I go along.