You'd have to watch something pretty ****ed up to get arrested. As long as your not a pedophile, I'd say your good. and maybe zoophilia stuff, that might be illegal to watch I'm not sure about that though. Other than the first and maybe the latter, you can watch any kind of porn you want. Hell, even 2 girls 1 cup or something like that is legal to watch. The only danger with porn is that if you start watching really off the wall stuff that you'd never be able to get anybody in real life to do, you can get kind of desensitized.