I have no idea why people like that crap.
But I guess it can always be used as an example as to why drugs are bad.
Some people have taste in experimental music, FKA twigs is one of the few artist who has a distinct style in the experimental genre. Sure her music videos may be "mature", but there's a deeper meaning behind her music that most artist these days lack "pop stars to be exact; nicki minaj,justin beiber etc."
One of the reasons why I like FKA Twig's music is because of it's otherworldly, electronic, heavy base aspect that all ties together into a unique piece. I don't really mind the mature lyrics at all, plus she has songs that don't include that isn't so mature toned.