Quote from Phoebe in The One with the Cake
Rachel: You know, Pheebs, when I was little, on my birthday my daddy would hide a present in every room of the house. And then he would draw a treasure map to help me find them all. Phoebe: Oh. I love family traditions like that. When Ursula and I were kids, on our birthday our stepdad would sell his blood to buy us food.