I'm closer to the "nothing to hide" sentiment too (and personally I believe that a lot of privacy we take for granted is a historical aberration created by urbanization and is doomed to be removed by the progress of technology). Nevertheless, reducing the series of laws to the question of "will this particular law allow the government to see my dick (and if so, under what circumstances)" is useful, because it focuses on the things an average citizen can understand and relate to, while at the same time revealing that not every surveillance law actually implies snooping on private data.

"Dick pics" are actually a pretty good example of something one clearly doesn't want to share with third parties, but may not be aware that they're already sharing (or can be sharing under circumstances that may not be immediately obvious).