Movies and sexual scenes?

I have watched too many movies.
But i have noticed on thing that sex is being more common in movies, actress are getting naked showing their boobs ass are being so common. Actors showing penis, like in bay watch there was a penis of dead body.
Moreover the sex, its like they just put the sex sceaniro like it is must.
I don't know why is that happening?
Plus girls going braless more often.
Movies and sexual scenes?
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