Pussycat is not a troll. Not that there's anything wrong with that. I've kissed worse than trolls. But anyway, since Pussycat isn't a Troll, and because I've been monogamous since I was a teen, and haven't kept up with these crazy kids today and their customs, lingo, slang, expressions (Michaelr? huh? get what?) please help me understand this song I heard on the radio today Pussycat.

The gentleman sings "I'd go down on my niece, and kiss the ground that you walk on baby, if I could just hold you again."

   Well. I don't understand if this, I think, unusual declaration is something that his lady friend would... okay let me start over. Is this, now, typically, something that is understood to express a persuasive degree of devotion? To be clear, I'm familiar with the figure of speech about kissing the ground that one walks on. Still, the sense of this apparently earnest lyrical figure eludes me.