The way I look at the sixual relations in the Dunmer tradition is similiar to that of the classical world. There is no term such as there is today for a homosixual in ancient Greek or Latin. It was common practice for men to have wives, concubines and to bugger their 'students' as it were. As usual it is a simple cultural divide which our modernity prevents us from understanding.
Homosixuality and hedonism were not viewed with disdain by the general populace of the pre-Christian world. The idea of homosixuality being morally wrong has its origins in Abrahamic religions. Many religions that predated the spread of Christianity had no problems with it. Some religions even had ritualistic orgies. Now, I'm not saying anything against Christianity. I'm american (a predominantly christian country) and was raised Protestant-Christian. I'm simply commenting on social morals and how religions affect them.
So... FYI (especially to the moderators) I didn't knock anyone's religion or sixual preference.
Now, that being said, think about the social morals of the dunmer. Their religion, pre-tribunal, revolved around several daedra, a few of which had sixually oriented spheres. One in particular, Mephala, became known as the anticipation of Vivec. Admittedly, the tribunal themselves were chimeri in religion (prior to their ascension) much in the same way that Christ was technically a Jew. So, all of this paints a rather distinct picture of the way promiscuity is handled by the dunmer. I'm sure the Tribunal were very sixual beings.