In attempts to translate Foucault's arguments into a more direct postmodern discussion, I think he would support the concept of the collapse of social barriers by arguing that sexuality is not a natural category.
He seems to believe that sexuality is something that was created by our culture, our discourse, and that sexuality is basically a socially constructed category. In other words, there are no real categories of distinctions in life, but these categories originate from ourselves. They are man-made and not real.
This makes us question why this sort of category exists in our society. What are, if any, the implications that Foucault is trying to make? Also, with his discussion of the "scientia sexualis", or the science of sexuality, there seems to root from this a need to discover the truth behind sexuality. Or rather, what is the truth behind our society?