I have downloaded a number of items from the iTunes store which are marked as CLEAN. I understand this is common in tracks (I'm looking at you, rappers!) where an EXPLICIT song has has the swear words removed or bleeped or reversed etc. However, the tracks I have are the original recordings, and are not clean versions of tracks that were originally explicit:
What makes iTunes decide to add these flags to certain songs, and what is the point of a CLEAN tag?
In the example given every track is marked as clean, but I have seen it on individual songs also.