I guess the explicit tagcomes directly from the music prodution companies, and if they have it, then Spotify puts in the graphic but wow- they seem to not have any real set standards for that identification.
For instance, Bruno Mars' new single 24K Magic is filled with curse words and sexually sugestive lyrics, but is not labeled right-
whereas Rhinnah's Stay, while topically could be considered definitely adult, especially considering her past, coloring the lyrics much more intimate, there are no curse words or direct images or references. I have been able to dilute down the ideas and explain it to my 6 year old.
So- maybe it's kind of like the music industry and the MPAA. Maybe there are no specific direct rules. Maybe there is no overall group-- but if I wanted to address this with someone, who would I contact?
Thanks for your time.