Roo already beat me to the punch, but you so deserve those extra points. Most of the time when people do something to include all prompts it feels forced, but this was awesome and hilarious.
I loved the image of Severus' hand darting out into the hallway and grabbing a cherub, then pulling it inside to do terrible things to it. The dead cupid was excellent. Seriously...*claps*
But I really loved how Lucius was supportive, yet still himself. And a drunk Severus is always funny. *pets him*
And the end! Yay for both of them getting their heads out of their asses. Huzzah!