Quote from Norm in Woody Interruptus
Woody: What do you think about premarital sex, Mr. P? Norm: Well, Wood, there's an old saying, you know, uh... "Why buy the cow when you can get the milk for free?" Then of course, you, uh, you get married, you wake up one day and realize: "Oh, my God. I've married a cow." Woody: Thanks, Mr. P.