And you think it's perfectly fine to show the result to a kid?
Sex depicted in a movie is not a stunt, it's sex. Falling down a flight of stairs isn't a facet of a human being. Sex occupies a place in the human psyche as well as being the means by which humans reproduce. Trivializing it has through history led to more human pain and suffering and death than probably damn near anything you can mention. That aside; I don't know what violence you were immersed in as a kid but the violence I saw approved of was in service of high principle and done in spite of the risk of death. If you're talking about the GRATUITOUS VIOLENCE prevalent today THAT is just a vector, like gratuitous sex that has been used by the enemies of our once great culture to destroy it. Your use of the words sex and violence without any moral focus or context is a symptom of the disease that is ravaging our culture today.
If there is no sexual violence, I see absolutely nothing wrong with a kid watching adults make love. Everyone was created by it and most people will do it.
I think our huge obsession with hiding it is completely irrational and unhealthy.
Kids are guaranteed to find out about sex anyway (it’s not that complicated) and the human race is naturally rebellious against parents