Why

These are some terms and ratings that you might not understand. So here I am to explain to you.

Ratings

G - This means that the fic has no swears and nothing major. This fic is usually good for everyone. (Anime Relation - Hamtaro; Hello Kitty)
PG - This is more common than G and may have a few minor swears here and there. It may have some violence and very light sexual content. (Anime Relation - Princess Mononoke)
PG-13 - This is a little more adult and much more common around the Inu-Yasha community. Some of this may not be appropiate for younger teens and may have heavier swearing and a lot more violence and sexual content. (Anime Relation - Inu-Yasha)
R - This has a lot of swearing and a lot of violence or sexual content. This would not be suitable for most younger audiences. (Manga Relation - Ranma 1/2)
NC-17 - This is sexual all the way. This will have very descriptive sex scenes and should not be viewed by anyone under 17. The author and the host are not to be held responsible if you view an NC-17 and you are underage. (Anime Relation - Anything hentai)

Terms

AU - Alternate Universe; this means that the characters are taken out of their usual surroundings or plot and put into a different "universe". (E.g. Inu-Yasha put in modern times in high school)
OOC - Out Of Character; this means characters will behave out of their ordinary behavior. (E.g. Naraku acting extremely nice and generous to everyone or Sesshoumaru actually showing emotion)
WAFF - Warm And Fuzzy Feeling; this means that is one of those moments that make you go "Aw...how sweet..." These are usually the touching romantic moments and nothing more than a small snuggle or cute moment between two people who love each other.
Lime - This is more heavy kissing and embracing, more intense than WAFF, but not nearly as strong as a lemon.
Lemon - This is really descriptive sex scenes. Not for the young audience at all and for your adult audience.
Yaoi - Male/Male relationships
Yuri - Female/Female relationships

Don't see something up there and you have a question about it? Let me know and I'll get it posted up as soon as I can. Plus, look back here for some Japanese words commonly used in Inu-Yasha & other anime fics! E-mail me with terms I failed to mention and if you know the definition provide it, if not, I might.