SEx scene on children movie

I really don't think this is a kids movie. The book was written for adults. In order to understand it, you have to be at least a teenager. I was about 13 yo when I first read it, and I didn't understand the finer nuances. Of course, I knew it was supposed to be an allegory about communism in Russia, and I couldn't fail to notice the important role played by the pigs. I recognized Old Major as Marx/Engels, and that Moses was the church… I didn't get the Snowball/Trotsky thing, however, and I definitely did not understand the part Squealer played in the novel. As for Boxer's fate, I was actually unsure about this…to my teenage mind, Squealer's explanation (the vet had bought the van from the horse slaughterer but did not paint it over yet) made sense.
And the "sex scene" in this movie…well, you don't actually see any naked skin, younger children might not even notice what it's all about. They might rather be frightened by the scenes in the butchering room, Old Major's skull with parts of flesh still hanging from it or the explosion of the windmill.