I remember reading about this "disgust" theory before and it made a lot of sense to me (that it made a lot of sense to me does not make it true, of course).
Conservatives just tend to be grossed out by difference. One signal to me of how much "conservative" there is in "conservatarian" is that all the glibertarians get about as punk rock as wearing a leather jacket. The freedom is the freedom to conform, because people who don't comform are icky.
