Is nudity or sex scene really necessary, as they say, 'required for the plot'?

Surely I do enjoy it, but I also wonder if the movie/series could also have survived without it🤔

Is nudity or sex scene really necessary, as they say, required for the plot?

If you find a good movie that have a strong chemistry or sexual tention between characters, what would you prefer?

1.) Nothing, keep it simple.
2.) Yes, sex scenes without clothes.
3.) Nudity is okay, but sex is not required
4.) Just show with such camera angle that it's clear that they are penetrating, but with clothes on.

Is nudity or sex scene really necessary, as they say, 'required for the plot'?
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