Porn Fail!--Write what you know or Do The Research!!
It must be said, I love porn. I really love it when porn makes it's way into fan fiction. Even though most fan fiction writers are a bit tentative and most of the porn is pretty soft, it can still be very hot. I have to admit, I probably come to it from a different place than most who write fan fiction since I used to write hard-core, kinky-filthy, acts-that-are-still-illegal-in-most-of-the-US type of porn long before I got into writing fan fics. In consideration for the sensibilities of others, I do tone down my porn-lit tendencies in my fan fiction (yes readers, that is the very tame version). Not only have I written some hard-to-swallow stuff, I've lived quite a bit of it. I spent over a year and a half married to a man who used terror as a means to control me. After I escaped and recuperated a while, I spent the next five years in a frenzy of sexual freedom. I indulged just about all of my fantasies and several I hadn't even dreamed up on my own, It is possible to become drunk on freedom. However, I digress. Having had a life-long and abiding love for sex and all things sexual, I have become something of an information sponge when it comes to the subject. What I haven't actually lived out, I've researched pretty thoroughly. All of the major kinks and fetishes have been absorbed and several of the more obscure as well. Standing at the buffet table at many an orgy, I have been told by the sex-obsessed that I "know too damn much about sex." (Sadly, I have a love of sharing what I know and kind of wind up like a professor at a seminar in porn college).
Now, why this exercise in TMI you ask? It's simple. I don't expect everyone who writes fan fiction to have my rather broad acquaintance with acts of a carnal nature. Hell, I have extensive knowledge but even I do not possess an encyclopedic wisdom on the subject. Trust me, there are more kinks out there than any one woman can ever really know. However, if you are going to write about sex, do your research! I will be the first person to applaud imagination but if you are going to, let's say, write about BDSM, do look beyond the fact that participants tend to wear some leather and use implements called "whips" and "floggers". Information is ridiculously easy to come by on the internet and I assume if you are posting on it, you have access to it! I pick BDSM or D/s because it's something a lot of people who don't know latex from leather, cowhide from deerskin or a ball gag from a cock ring like to try and write about! There are so many sites offering information on that particular subject that you can't swing a paddle on the internet without hitting one. You can see photographic evidence of what sort of damage results from a whip, a flogger, a paddle, a crop...I could go on but I think you get my point by now. You'll also quickly find out that to be called "BDSM" or "D/s" the acts must adhere to the concept of "Safe, sane and consensual" If the man/woman wielding the whip didn't ask the man/woman being whipped for permission, than it's torture not BDSM. If someone who's restrained is fucked without permission, it's not domination, it's rape.
Then there is anal sex. I love to read anal sex scenes by someone who's clearly never actually engaged in the act. Spit is not an adequate lube!! Not unless you frequently engage (and have very recently indulged) in anal sex, then sometimes it is. If you want your inexperienced character spit-lubed, prepared to make them hurt! They may enjoy it but it still hurts! No lube at all...crazy pain! Also, a one finger stretch for 30 seconds...not gonna cut it. Again, there is a lot of information available on the subject. Read some of it!
I won't even get started on the many other kinks out there, I'd be typing all day...probably all week. However, I think I've made my point. If you don't know what you are writing about then FIND OUT!
Thank you, that is all.