An interesting blog. The concept described and titled being "sane" is actually the more subjective component of the three precepts. One person's sanity is another person's perverse insanity. Perhaps a better concept would be "responsible", both to each other as well as to ones' self. The DSM IV not withstanding, the designation of "sanity" is generally only attributed after the reverse of the condition is revealed. Abusers will always abuse until stopped; if they find a partner willing and consenting to be abused then there is no stopping them until such circumstances clearly demonstrate their insanity. Unfortunately responsibility rarely accompanies these individuals either.