Yes, with no internet and technology back then, I guess it was the major source of their entertainment. With internet these things would hide/block under porn. Hahaha!

Yes, I saw the jewellery but I am not sure of the crown. I guess it is their head jewellery. Not sure!

You may be right. These may be the king's perception. Or the sculptures are trying to depict the courtesans, or apsaras or may be jewellery was normally adorned by every woman in those eras. We can only guess.