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IMO, pornography is realistic enough; seek out the "homemade" variety. I think you can tell if these are scripted or being "acted". Particularly if there is any hint of role playing; it isn't reali...
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Source: https://writers.stackexchange.com/a/38729 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/38729 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
IMO, pornography is realistic enough; seek out the "homemade" variety. I think you can tell if these are scripted or being "acted". Particularly if there is any hint of role playing; it isn't realistic, and probably if there are multiple camera angles, it isn't realistic. (An exception for iPhone video, where the hand holding it can move about). At least some of them really are just a fixed camera focused on the bed and two people going at it. Be aware, sometimes initial minutes are cut as "boring", getting undressed or ready. Besides that, aid your own imagination with props. Whether you have experience or not, find a wheelchair to sit in, perhaps at the E.R. of the local hospital. Imagine for yourself what could be done. Take picture of it, or yourself in it. You can find on porn a picture of a naked guy with an erection sitting, so you can see the logistics problem. Now wrap a wheelchair around him, and see what's possible. It will be truly be easier if you are sitting in one! I'm pretty sure fellatio would be pretty easy for a guy in a wheelchair; perhaps something like a [backwards cowgirl](http://sexpositions.club/positions/185.html) could be executed; or in that link click on the "seated" tag and there are dozens of positions shown, I see 2 or 3 that might be possible (for a flexible girl). Don't sell your imagination short. A few pictures to get the mechanics right, and the rest is fair game. Nobody else is exactly like your characters, so as long as you don't break the laws of physics or biology I think you'll be fine.