3 thumbnails of a sexual nature
11 thumbnails of animals (many with captionz)
4 thumbnails of pics that are just kinda cool
2 thumbnails of pics that are weird shit
1 thumbnail of a webpage graphic to denote other pictures
So, out of 21 pics, I'd probably only have any use for the 4 that are kinda cool. That's less than 19%, and this value has become my new non-scientific de facto standard of how many images on the web have any real merit whatsoever.