Would Smurf porn be considered a blue movie?

My daily recycling e-mail mentioned an MRF, which stands for a Materials Recycling Facility. In the World According to Ob, it's pronounced "murf". Ob seems to get a kick out of talking about "dirty MRF's".

Putting aside my distaste for all things Ob, "dirty murf" sounds to me like a pet name for someone in the bedroom.