Adult movies are classified with the following warnings:
[AL] = Adult Language - use of profanity, extreme swear words, sexual language, etc.
[N] = Nudity (self explanatory

)
[GL] = Graphic violence - gory violence, brutal killings, murder, etc.
[SS] = Scary Scenes
We do make a lot of adult movies in India (except Nudity - officially), but the points made by the "moral police" in India are:
a) In cinema halls, children can be denied admittance to "A" films (ha! ha! we know the truth)
b) On TV, there is no content management to prevent improper exposure (this is not true in case of CAS, STBs)
c) Parents will not be able to control what the children watch (maybe)
But none of the above really hold water. It is just that the "moral police" have self inflated egos and imposed self righteousness.