Porn contains: outdoor, risky public fuck, risky public nudity, risky creampie, public blowjob, almost caught, risky, teen creampie, bent over, public flashing, clit piercing, piercing.
I'm sure it's better to search for porn with tags rather than categories. Usually authors specify a few general categories and lots and lots of qualifying tags. Here's a list of the most popular amateur porn tags. Not enough? Below is a link to all the tags used on Hobby.porn.