I have a Recommender System which recommends Articles based on Similarity from 3 Features, "Page-Title, Article Content, Tags". But some of the Articles are NSFW(Related to Adult Topics). I want to keep these Recommendations separate from the normal ones? Any idea about how do I go ahead with it,
I was thinking about keeping the adult articles separate and using another metric to recommend them, but I do not feel its right as it would create a whole different Recommender System.