I've always been puzzled how in movies on TV in the USA, they'll air brush nipples, cleavage and butt cracks away... in the same scene that someone is being gruesomely murdered with blood spurting and entrails hanging out. It makes no sense that nudity is too dangerous for children to see, but desensitizing them to violence and gore is OK.
Our culture is biased in ways that helped it survive harder times.
The bloodlust is easy to explain. The tribe better at war survives. Veneration of honorable warriors runs deep in our veins. Sales for Top Gun, Marvel movies, action games continue to soar.
The puritanical outlook developed to create stable monogamous families. That bit of artifice is dissolving now. More polygamy means the top men hoarding reproductive access, which historically leads to instability. Sexual socialism was an interesting run, but with the demise of religion, I'm not sure how we could save it.