Quote from Phoebe in The One with Joey's Bag
Frank Buffay: Well, you know, in my defense, I was a lousy father.
Phoebe: That's your defense?
Frank Buffay: Yes, it is. I burned the formula, and I put your diapers on backwards. I made up a song to sing to you, but that made you cry even more.
Phoebe: You make up songs?
Frank Buffay: Well, no, just that one. But it was stupid. Let's see, how did it go?
[singing to the tune of "Smelly Cat"] Sleepy girl, sleepy girl, Why won't you go to sleep? Sleepy girl, sleepy girl, You're keeping me up-