When I was done with the second half of the Star-crossed series, Journeys, I decided that it would be sneaky and clever to put a watermark of very penis-looking anemones on every page. That way the reader would wonder if they were looking at penises on every page. And it was pretty darned funny, when I did it.
However, the watermark did not transfer when I changed the formatting to upload the file. So, the literary world will not have the pleasure of wondering "is that a penis?" on every page of my book. Sorry world. The time has not come.