Porn may be great as a source of inspiration when it comes to positions, but the should add something like “The positions shown in this movie are performed by trained and prepared professionals. Unless you or your partner have taken instruction from a trained professional, please don't try this at home!”
I sometimes wonder how long it will take before you get lawsuits against porn studios for not having such a disclaimer and someone at home trying to copy something and tearing his/her partner a new one in their own stupidity… I mean, how long can it take? Some people are stupid enough to try and dry their pets in a microwave…