Why I'm thankful for self check-outs

Read the second comment on the Goodreads thread  for Pat Califia's Public Sex. Living in a conservative part of the US, there's rarely a day when I'm picking up at the library that I don't expect something like this to happen:

"I got this book out of the public library. I had it sent over to my local branch, and when I went to pick it up the librarian returned from the storage room slowly, staring at the front cover. When he got back to the desk, he held the book up to another employee and asked "Why do we have this?" The person shrugged and the librarian switched to reading the back cover, still not looking at me. Finally he held the book up to me and asked why I wanted it. I hesitated. "Is it a how-to?" he asked. "Are you doing research? Is it for school? Why are you interested in this?" "I just am," I stammered. "That's one reason I guess," he sneered, and then set the book before me. Couldn't have illustrated Califia's points more perfectly... "