I think there's as much reason for showing as much sex as they do, as showing as much violence as they do. They serve exactly the same purpose. It's a very mature and dark fantasy series, which definitely pushes the limits regarding the depictions of both violence and sex. It's consistent with the world Martin created, so really I think the opposite is true. If they had pulled any punches regarding the sex, it would have been seen as prudish.
Exactly - this isn't the Animals of Farthing Wood here.
The book(s) portrays a realm which is very brutal and uncompromising. There is a lot of murder, backstabbing/duplicitousness, battle in all its visceral, skull-splitting (and often) unpleasantness, forced marrages, underage sex (Daenerys Targaryen is 13 at the beginning), rape and other brutality.
...or they're trying to be as graphic as possible to shock, titillate and stir controversy as much as they can for the sake of viewership/reputation.
Had they made an adaptation of The Animals of Fathing Wood then the gratuity could be called into question.
I would argue that it is, in fact toned down for the most part.
I think it looks great and there are some stunning looking actresses there. I personally prefer to see naked breasts than graphic violence, but hey-ho, that's just me.
If I wanted to I can see better/worse on youtube (or other sites) to be fair.
But, then again, this show isn't derived from material as stuffy and chaste as Lord of the Rings (which I love tbf. movies and books)