I'm thinking of buying my five-year-old son a gift certificate to see twenty R-rated action movies.
Why would you let a kid see R-rated movies?
I would allow him to see, what's the big deal? He sees more graphic detail on television
I feel like your son will not understand the movies and think of them as normal behavior and he may end up normalizing the actions of the actors in those R-rated movies and you will end up having a son that will not have good values when he grows up, so I suggest you don't do what you're planning.
It's fine, he's five. He wouldn't understand the movies anyways.
You're right that he wouldn't understand it, but may think that those movies are normal and will end up being confused about what is right from wrong, and it may ruin his understanding of things. I suggest you just let him watch more appropriate TV shows and movies so that he will not have a bad childhood.