Marshall: Let's make a baby!
Lily: Whoa! Baby, you're packing snowballs, and your breath smells like a mermaid fart.
Marshall: Loving the dirty talk... But you know what's even hotter? If we face this-a-way. Ooh, we're bad.
Lily: Wait... hey, baby, why are you facing me north? [gasps] You're trying to make us have a boy.
Marshall: I can ex... How do you know about the north thing?
Lily: Um, um...
Marshall: And what are you doing with those lemons? You're trying to make us have a girl!