Quote Originally Posted by Mad Lews View Post
Yes a title it is, most often. But on occasion, in this genre at least, the title becomes the proper name by which the sub addresses the individual that is his/her Dom. It in effect becomes a proper name. Or am I just stretching the rule?
Mad
Why does it matter? In any case where the border between title and proper name is blurred, the word is capitalized anyway. At least any case I can think of right now.

The rules above that show non-capitalized versions seem to be at times when there's no danger of anyone considering the title to be a name.