Saw. Because the worst stuff (like sawing off the leg) is off-screen. Besides, if my child is anything like me they'll get bored and fall asleep half-way through the movie.
Edit: And assuming the OP is correct and my child is completely innocent then perhaps the movie might surgest that the whole world isn't sunshine and farts. The kid will probably know that the movie isn't real and that there aren't psychos around every corner.
On the other hand porn could instill some thoughts into my kids head that every attractive school teacher would only every be interested in making him stay back for "extra credit" or that if his wife calls the plumber while he's out he should instantly accuse her of cheating (because why else would she need a plumber?) How many adverts have we seen online for stuff captioned "Real Milfs" or "Real ex-girlfriends" etc. Many try to instill the idea that it's all real (and it is to an extent it is since the "actors" actually have sex) while a kid is more likely to see Saw as being as fake as it is.
Edit: And assuming the OP is correct and my child is completely innocent then perhaps the movie might surgest that the whole world isn't sunshine and farts. The kid will probably know that the movie isn't real and that there aren't psychos around every corner.
On the other hand porn could instill some thoughts into my kids head that every attractive school teacher would only every be interested in making him stay back for "extra credit" or that if his wife calls the plumber while he's out he should instantly accuse her of cheating (because why else would she need a plumber?) How many adverts have we seen online for stuff captioned "Real Milfs" or "Real ex-girlfriends" etc. Many try to instill the idea that it's all real (and it is to an extent it is since the "actors" actually have sex) while a kid is more likely to see Saw as being as fake as it is.