It's gratifying to see that you caught the symbolism of the explicit vs non-graphic sexual description. That's exactly what I was trying to underline--the difference between the two relationships.
You know, I've thought about Harry and Draco, and in a way, I don't think they'd have been good together permanently, almost as if they were a 'transitional' relationship for each other. And too, Draco knew weeks before they brought him back, that Severus and Harry were on a collision course. But I think that Harry gave something very valuable to Draco--a belief that he was worthy of being loved, that people, especially himself, weren't chained to the past, and could change.
I'm pleased you enjoyed the story--thanks so much for your thoughtful comment--it's appreciated.