Quote from Ted in False Positive
[As Lily and Marshall talk about getting a puppy, Ted angrily throws his gingerbread house on the ground:] Marshall: Whoa! Barney: Our movie snack. Ted: Are you kidding me? All you ever talk about is having kids! And now you have one little freak-out and you wanna get a dog instead? No. Unacceptable. You're gonna turn around, you're gonna go home, get naked, lie together as man and wife until Lily is great with child. Right now! I'm serious! Go! Go! Go!