I have doubts about the song Loving Parasite

This song has been widely misinterpreted (I thought it was a pedo POV, but it turns out it's just about a toxic relationship), and after learning its other meaning, I have many doubts about it.

Is the song told from the perspective of the "parasite" or the person who is the victim of that "parasite"?

What is the point of mentioning that the other person is younger while the person is older? (This was the point that confused many people, including what I said before.)

And finally, is the lyric entirely about emotional manipulation, or is there something more?