Utterly charming. But then Shakespeare and Snarry together are pretty much a shoo-in.
when he was young and the snitches were bright.
What a sweet, in-character nod to the passage of time. I'm also very fond of the way Severus cherishes Harry's potbelly. And I applaud you for including a whole sonnet serenading love's aphrodisiac affect on an infatuated prick.
I got tossed out, alas, by the mention of de Sade, but that's not your fault, it's my squick. *puts on Rickman reading sonnet 130 to restore proper mood*