stop vomiting sh!t. Sex is the reality of life and movies are meant to show anything related to life. Hollywood does not believe in limiting art and creativity and explores anything related to human life. it presents it in such a way that its easy to relate them with real life and thats what make it a grate movie industry.
when you see a happy scene, you relate with the situation and feel happy.
when you see a sad scene, you relate with the scene and feel sad.
when you see a painful scene you relate with the scene and feel pain
similarly when you see a sexual scene, you relate with the scene and feel sexy.
open your brain idiot.