This would mean the Sith are Buddhists of the Tantrist school. They are Buddhists because Buddha said to walk the middle way, a line between all opposite extremes, to balance the Force. The tantrist side of the Sith is passion, love, hate, anger, and fear which is not forbidden and is also included in the Sith path to enlightenment. Sex as a way to unite with the Force and the other emanations (gods with a little "g" or angels and archangels), which would also be included in the Sith path. This of course would cause an antagonism between the Jedi (which is the yogic path of denial and celibacy) and the Sith. The Jedi naturally want a psychic or psychological burqua on the population causing stagnation and depression across the galaxy. The Sith want freedom which menas vitality, passion, anger, hate, love, sex and room to grow. Of course, do not forget the power wasted rule.

Ian McDiarmid does really well in Episode III because Palpatine, despite his disfigurement, is sexually attractive and full of energy. Of course, he is attractive before the disfigurement.

Palpatine definitely is a good Sith salesman. It is very understandable why Anakin would attract to someone strong enough to free him from the oppressive Jedi. Anakin deep down cares for Palpatine as a friend because he saves Palpatine from Mace. So despite Anakin's flip flop, in the last analysis, he came through for Palpatine. As attractive as Palpatine is, Anakin/Vader will always be my favorite because Anakin/Vader is still the most attractive inside as well as outside.