[An eyebrow raises in return, because Billy Kaplan you did the exact same thing for his birthday, and he was definitely too old for that nonsense. Still, he smiles, and he sets the cake down in front of Billy before moving behind him to wrap his arms around his neck and rest his chin on top of his head.]
Mmhmmm.
Happy birthday to you, Happy birthday to you, Happy birthday, dear Billy, Happy birthday to you!
[A small pause, and then:]
And now, You are seventeen going on eighteen, I'll depend on you.
[action]
Mmhmmm.
Happy birthday to you,
Happy birthday to you,
Happy birthday, dear Billy,
Happy birthday to you!
[A small pause, and then:]
And now,
You are seventeen going on eighteen,
I'll depend on you.