Oh not at all. In college I was the doorman at this expansive old theater converted to triple x. It was in the center of town so we got a lot of horny suits coming in for a little wack-a-do. But I never bothered to look into the meaning of just one or two x's.
I really, really wanted some the movie posters they got. But the woman who apparently ran things knew a gold mine when she saw one.