This link shows, by country, the most popular search terms entered on pornography web sites. It's also possible to look at individual US states. There are no images located here, and only an occasional use of the standard sexual slang terms (if they are among the top ten for a country/state).
While much of this can be viewed in a humorous context; it's also interesting to note how cultural, political, religious, and geographical differences affect the terms most commonly searched for.
Global Internet Porn Habits Infographic | PornMd Sex Search